Wednesday, November 8, 2017

2017 UEFL Award for Honorable Umpire - John Tumpane

John Tumpane is 2017's Honorable Umpire of the Year [2016: Rob Drake & John Hirschbeck].
Voting Results (Top 5): Tumpane (37.4%), Phil Cuzzi (9.2%), Ted Barrett/Drake (6.5%), Bill Welke (5.2%).

John Tumpane is the Umpire Ejection Fantasy League's 2017 Honorable Umpire of the Year.

Award Winner: John Tumpane.
In his first complete season as a full-time MLB umpire, having been hired to the staff midway through the 2016 regular season, Tumpane ejected six players and managers, finishing 15th on the RAP leaderboard with a .647 (11-for-17) Review Affirmation Percentage.
Related Post: MLB Officially Hires John Tumpane to Full-Time Staff (7/1/16).

On June 28, Tumpane intervened upon observing a woman standing on the river-bound side of the Roberto Clemente Bridge, speaking with her and eventually helping pull her back toward the bridge and away from the Allegheny River below.
Related Post: MLB Umpire John Tumpane Saves Suicidal Woman's Life (6/28/17).
Related Post: Let's Talk - Mental Health in an Abusive Environment (10/10/17).

After the regular season, Tumpane officiated his first postseason game as a member of Mike Winters' AL Wild Card Game crew; Tumpane's postseason assignment after just his first full season as a full-time umpire virtually ties a modern-era Major League record for quickest playoff assignment after hire (Ted Barrett, for instance, worked the 2000 National League Division Series round after promotion to the staff in July 1999).
Related Post: 2017 Wild Card & Division Series Umpires Roster (10/2/17).

UEFL Awards History, John Tumpane
Fill-In Umpire of the Year: 2015.

John Tumpane now has 18 points in the Umpire Ejection Fantasy League (16 Prev + 2 Award = 18).
The next postseason award, Promising Umpire of the Year, will be released tomorrow.

2017 UEFL Award for Crew Chief - Ted Barrett

Ted Barrett wins the UEFL's 2017 Crew Chief of the Year Award [2016 Winner: Ted Barrett].
Voting Results (Top 3): Ted Barrett (24.5%), Joe West (16%), Mike Winters (12.3%).

Award Winner: Ted Barrett.
Ted Barrett is the Umpire Ejection Fantasy League's 2017 Crew Chief of the Year, which marks his third time winning the Crew Chief of the Year Award, and second consecutive award. In his 21st MLB season, Barrett experienced one ejection as the result of a correctly officiated balk call in Anaheim.
Related Post: MLB Ejection 056 - Ted Barrett (1; Brian Snitker) (5/31/17).

Earlier in the season, Barrett identified the rarely-seen disruptive variety of unsportsmanlike conduct embodied in Rule 6.04—which prohibits any fielder from taking a position in the batter's line of vision and acting in a manner to distract the batter—and ordered the violative fielder Jonathan Villar to stay put with the help of 2B Umpire Lance Barksdale, who efficiently relayed the message.
Related Post: Case Play 2017-3 - Illegal Batter Disconcertion [Solved] (4/27/17).

As was the case in 2016, all four members of Barrett's regular season crew—Barrett, Angel Hernandez, Lance Barksdale, and newcomer John Tumpane—officiated during the postseason, including Tumpane's first-ever selection to the playoffs.

All members of Barrett's crew worked October.
With his own ALDS selection this fall, Barrett has officiated the postseason for 13 consecutive years (2005-17). He finished 16th amongst 92 tracked umpires with a .643 Replay Affirmation Percentage, having been overturned five times in 14 reviews.

UEFL Awards History, Ted Barrett
Umpire of the Year: 2014.
Honorable Umpire of the Year: 2012, 2013, 2014.
Crew Chief of the Year: 2014, 2016.

Ted Barrett now has 12 points in the Umpire Ejection Fantasy League (11 Previous + 1 Award = 12).
The next postseason award, Honorable Umpire of the Year, will be released tonight.

Tuesday, November 7, 2017

2017 UEFL Award for Fill-In Umpire - Stu Scheurwater

Stu Scheurwater wins UEFL's 2017 Fill-In Umpire of the Year Award [2016 Winner: Adam Hamari].
Voting Results (Top 3): Scheurwater (48.2%), Ryan Blakney (13.6%), Chris Segal (8.2%).

Award Winner: Stu Scheurwater.
Stu Scheurwater is the Umpire Ejection Fantasy League's 2017 Fill-In Umpire of the Year. In his fourth season as a Major League fill-in, Scheurwater worked the vast majority of the season at the MLB level, more than doubling his prior big league experience of 100 games from 2014-16, and spending the bulk on the season on the injured Dale Scott's crew.
Related Post: A Look at the Dale Scott Crew Without Their Crew Chief (5/24/17).

Scheurwater concluded the season with five ejections, including his first career heave-ho in late April over a correctly officiated balk call. Said one commenter, "He handled both the call and the aftermath like a star. I have a feeling he is going to be full time next year."
Related Post: MLB Ejection 021 - Stu Scheurwater (1; Buck Showalter) (4/30/17).

Scheurwater listens to and ejects Joe Girardi.
In Replay Review, Scheurwater's 11-for-21 affirmation rate (.524 RAP) beat out the league average of .504, and ranked fifth amongst call-up umpires (Sean Barber, Segal, Blakney, Shane Livensparger).

Scheurwater served in the Pacific Coast League in 2017, his sixth overall season in Triple-A.
Related Post: 2017 Pacific Coast League Umpire Roster (3/11/17).

UEFL Awards History, Stu Scheurwater
None.

Stu Scheurwater now has 11 points in the Umpire Ejection Fantasy League (9 Previous + 2 Award = 11).
The next postseason award, Crew Chief of the Year, will be released tomorrow.

2017 UEFL Award for Most Improved - Marty Foster

Marty Foster wins the Most Improved Umpire Award for 2017. [2016 Winner: Angel Hernandez.]
Voting Results (Top 3): Marty Foster (37.1%), Phil Cuzzi/Dan Iassogna (5.2%).

Award Winner: Marty Foster.
Marty Foster is the Umpire Ejection Fantasy League's 2017 most improved umpire of the year. In his 22nd Major League Baseball umpiring season, Foster ejected three people and drew praise for improvement over the past few seasons working on veteran Mike Winters' crew: "Sometimes you just need that crew you work well with and Foster has found it."

For the first time in a decade, Foster earned a position in the postseason, serving on Ted Barrett's crew for the Boston-Houston American League Division Series.
Related Post: 2017 Wild Card & Division Series Umpires Roster (10/2/17).

Foster's three overturned calls via Replay Review—paired with seven affirmed rulings for a RAP of .700—earned him a RAP rank of ninth in the League, and a tie for sixth place for fewest overturns.

One commenter said, of Foster and the Most Improved award, "he's really the only candidate," and the voting results support that notion: Foster easily won this award, defeating tied-for-second umpires Cuzzi and Iassogna by over 30% of the vote.

UEFL Awards History, Marty Foster
Worst Umpire of the Year (2012, 2013).

Marty Foster now has 3 points in the UEFL Standings (2 Previous + 1 Award = 3).
The next postseason award, Fill-In Umpire of the Year, will be released tonight.

Monday, November 6, 2017

2017 UEFL Award for Most Declining - Paul Emmel

Paul Emmel wins the Most Declining Umpire Award for 2017. This award was not given from 2011-2016.
Voting Results (Top 3): Emmel (10.5%), Joe West (8.6%), Kerwin Danley/Jerry Layne (T-7.6%).

Award Winner: Paul Emmel.
Paul Emmel is the Umpire Ejection Fantasy League's 2017 most declining umpire of the year, which marks his first postseason award. In his 19th Major League Baseball umpiring season, Emmel was promoted to Crew Chief, having served as an acting crew chief on multiple occasions in 2016.
Related Post: Source - Jim Joyce Retires, Holbrook & Emmel Promoted (1/16/17).

Emmel concluded the 2017 season with five ejections (.800 QOC) and 11 overturned calls via Replay Review out of 20 total calls sent to review (.450 RAP, ranked 53rd in the league).

In opting for Emmel for this selection, one commenter summarized 2017 as "a disaster of a season for him," referencing the aforementioned replay numbers, ball/strike statistics, and crew chief woes.

In regards to the latter, Emmel received criticism for his response during a September game wherein a fastball from Detroit pitcher Buck Farmer struck HP Umpire Quinn Wolcott on a direct shot as catcher John Hicks failed to catch the pitch. The offending fastball was Farmer's first pitch to Indians batter Yandy Diaz, effected immediately after Farmer walked Carlos Santana, and after Wolcott had ejected Tigers Manager Brad Ausmus and catcher James McCann for arguing a previous ball four call. No further ejections occurred.
Related Post: MLB Ejections 172-173 - Quinn Wolcott (McCann, Ausmus) (9/13/17).

Quinn Wolcott is hit by a pitch in September.
In our visual analysis of the sequence, we noted that while 1B Umpire Brian O'Nora entered into a sprint toward home plate after Wolcott was struck by the pitch, 2B Umpire Emmel appeared to walk, then ultimately jog, to the plate. Noted one commenter, "Emmel shouldn't be the chief of this crew. Brian O'Nora should." Another said, "[Emmel] really needs to step it up."
Related Post: Did Detroit Throw at Umpire Wolcott? A Visual Analysis (9/14/17).

Emmel, as crew chief, also presided over the first illegal re-entry in MLB history during an August game at Fenway Park when Red Sox first baseman Hanley Ramirez replaced DH Chris Young in the top of the 9th inning, only for Young to illegally return and pinch hit for Ramirez in the bottom frame.
Related Post: Player Illegally Re-Enters Game for 1st Time in MLB History (8/30/17)

In July, when Angel Hernandez sued the Commissioner's Office alleging racially-motivated discrimination, one of his arguments was that MLB promoted less qualified, white umpires to the position of Crew Chief, while more deserving minority umpires were passed over. While the suit did not specifically name Emmel (or any other individual umpire) as a less-deserving candidate for crew chief, one commenter included Emmel in a short list of recently promoted umpires that "are a bit questionable."
Related Post: Angel Hernandez Sues MLB for Racial Discrimination (7/3/17).

UEFL Awards History, Paul Emmel
None.

Paul Emmel now has 11 points in the UEFL Standings (12 Previous - 1 Award = 11).
The next postseason award, Most Improved Umpire of the Year, will be released tomorrow.

2017 UEFL Award for Worst Umpire - CB Bucknor

The Umpire Ejection Fantasy League announces its postseason awards schedule, beginning with the Worst Umpire of the Year, below, and continuing with Most Declining, Most Improved, Fill-In, Crew Chief, Honorable, Promising, Ejection(s) of the Year and concluding with Umpire of the Year. 127 total ballots were cast during this year's nominations process.

UEFL Rule 4-4 governs postseason awards distribution, which begins with the Worst Umpire of the Year.

2017 UEFL Awards: Worst Umpire of the Year: CB Bucknor (54) [2016 Winner: Vic Carapazza].
Voting Results (Top 3): CB Bucknor (12.7%), Angel Hernandez (11.8%), Carlos Torres (11.8%).

Award Winner: CB Bucknor (54).
CB Bucknor receives the Umpire Ejection Fantasy League's 2017 Worst Umpire of the Year Award. In his 22nd Major League Baseball umpiring season, Bucknor concluded the year with one ejection; he ejected once in 2016 and three in 2015. In a rare instance of an award apparently determined during the season's first month, Bucknor ejected Mariners Manager Scott Servais on April 16 (MLB Ejection 006 - CB Bucknor (1; Scott Servais)), with commenters acknowledging the correctness of the call, but decrying Bucknor's mechanics—first signaling "Time" before indicating "out" upon an apparent request by an opposing player—as contributing to the ejection.

Unfortunately, just days later, Bucknor was again involved in a controversial sequence, this time in Atlanta. On April 18, Bucknor called the Nationals and Braves back to the field after reversing an initial strikeout call to that of "foul ball." When the game concluded shortly thereafter, Nationals outfielder Jayson Werth confronted Bucknor, airing further grievances through the media thereafter.
Related Post: Bucknor's False Strikeout, Non-Ejection (Jayson Werth) (4/18/17).

UEFL Awards History, CB Bucknor
Most Improved Umpire of the Year (2013, 2014).

CB Bucknor now has 4 points in the UEFL Standings (7 Previous - 3 Award = 4).
The next postseason award, Most Declining Umpire of the Year, will be released later this afternoon.


Saturday, November 4, 2017

2017 Arizona Fall League Rising Stars Game Roster

The Arizona Fall League selected four Minor League umpires to officiate Saturday's Fall Stars Game, played at Salt River Fields at Talking Stick. The AFL umpiring staff is composed of 12 umpires from the International (IL) and Pacific Coast (PCL) Leagues.

Related Post: 2017 Arizona Fall League Umpire Roster.

HP: Javerro "JJ" January. PCL, 1st AFL.
1B: Jansen Visconti. IL, 1st AFL.
2B: Ramon De Jesus. PCL, 2nd AFL, 2017 MLB Spring Training, MLB Fill-In.
3B: Alex Tosi. IL, 1st AFL, 2017 MLB Spring Training.

Thursday, November 2, 2017

UEFL Year End Award Nominations for 2017

The Umpire Ejection Fantasy League prepares to distribute Postseason Awards to eligible umpires* who, during the past season, have demonstrated significant performances to fit the terms of one of these awards (UEFL Rule 4-4). The process begins with nominations and voting.

a. Umpire of the Year (min. 1 / max. 1 umpire)
b. Promising Umpire of the Year (min. 1 / max. 2 umpires)
c. Honorable Umpire of the Year (min. 0 / max. 2 umpires)
d. Fill-In Umpire of the Year (min. 0 / max. 1 umpire)
e. Most Improved Umpire (min. 0 / max. 1 umpire)
f. Crew Chief of the Year (min. 0 / max. 1 umpire)
g. Best Ejection of the Year (min. 0 / max. 2 ejections) [Link: 2017 MLB Ejections (UEFL Portal)]
h. Most Declining Umpire of the Year (min. 0 / max. 1 umpire)
i. Worst Umpire of the Year (min. 0 / max. 1 umpire)

Click here for the complete history and list of UEFL Postseason Awards recipients.

Please take your time in consideration of an umpire for as many or as few awards as you prefer; Ballots will be accepted until 11:59 PM PT on Sunday, November 5; Awards distribution will begin Monday, November 6. To cast your ballot, complete the following voting form.
Points scale for post season awards: a. (+5); b. (+3); c. (+2); d. (+2); e. (+1); f. (+1); g. (+1); h (-1); i. (-3).
*Eligible umpires are listed on the ballot for each applicable category. For instance, only umpires on the full-time staff roster are eligible for Awards a-c, e, f, h, and i. You may also write in an umpire if such umpire does not appear by commenting on this post. Make sure you use the phrase "Write In" so it is counted.

a. Umpire of the Year: This Umpire has been the best MLB Umpire the past year, bar none. This Umpire has been more dedicated, professional, and positive than all others. This award will be given to one umpire.
b. Noteworthy Umpire of the Year: This Umpire has been dedicated, professional, and has worked hard. Perhaps a rising star, the Noteworthy Umpire of the Year is an umpire to keep an eye on, for an expectation of great things down the line. This award will be given to one or two umpires.
c. Honorable Umpire of the Year: This Umpire has been the most honorable Umpire during the past year. Perhaps through Community Service, or through struggling with and overcoming his own difficulties, this Umpire has been the most personally admirable of all. This award may or may not be given to either one or two umpires.
d. Fill-In Umpire of the Year: This Umpire has been the best AAA Call-Up Umpire the past year, bar none. This Umpire has been the most dedicated, professional, and positive AAA/Non-MLB Full Time Umpire of all non-MLB Full Time Umpires. This award may or may not be given to a maximum of one umpire.
e. Most Improved Umpire of the Year: This Umpire has improved his overall performance from the previous season more noticeably than any other Umpire. Generally, this umpire has developed into a solid arbiter within the past year. This award may or may not be given to a maximum of one umpire.
f. Crew Chief of the Year: This Umpire has been the best MLB Umpire Crew Chief, the past year, bar none. This Umpire has led his crew(s) better than all others. This award will be given to one umpire.
g. Best Ejection of the Year: In the form of "Ejection 123: Umpire (1)," this award recognizes the best ejection(s) of the year. Nominated and selected due to form, mechanics, entertainment value, reason for ejection, or overall quality, the Best Ejection of the Year is awarded to one or two umpires for one or two specific ejections. The award may be given to one umpire for two separate ejections, in which case, he receives one point for each ejection.
h. Most Declining Umpire of the Year: The antithesis of the Most Improved Award, this umpire's performance may have dropped or declined more dramatically than any other. This award may or may not be given to a maximum of one umpire.
i. Worst Umpire of the Year: This Umpire has shown a continual regression in ability, and might have had a regrettable incident(s) occur in-season. The Worst Umpire of the Year is unprofessional and does a disservice to Umpires and the game. This award may or may not be given to a maximum of one umpire.

The ballot is available below. Click "read more" to view and vote.

Thursday, October 26, 2017

MLB Admits Mistake on NLDS 'Backswing INT' No-Call

MLB Chief Baseball Officer Joe Torre said NLDS Umpire Jerry Layne mistakenly no-called a backswing contact/follow-through "interference" play in Washington earlier this month, concluding that the rule should have superseded umpire Layne's on-field judgment.

You can read our full recap and analysis of this play here, along with two arguments to be made for two different calls (one which Layne made during the game and one which demonstrates why Layne's call of omission was incorrect...as well as the difference between "backswing" and "follow-through"):
Related Post: Follow-Through (Backswing) Contact or Batter Interference? (10/13/17).

The ball was dead on follow-through contact.
Summary: In Game 5 of the Cubs-Nationals NLDS, Cubs batter Javier Baez swung and missed at a 0-2 slider from Nats pitcher Max Scherzer, inadvertently striking catcher Matt Wieters' mask during his backswing. Replays indicate that prior to Baez's bat making contact with the catcher's mask, the pitched ball snuck underneath Wieters' mitt and rolled to the backstop for a passed ball. The sequence was kept alive, and the passed ball allowed runners to advance and Chicago to score a crucial run when Wieters subsequently threw the ball away during his ill-fated attempt to throw out Baez.

After the game, HP Umpire Jerry Layne found consistent use for the phrase, "in my judgment," explaining that since the passed ball had already occurred prior to the backswing contact, he felt that Baez's actions did not play a role on the uncaught third strike nor subsequent overthrow at first base.

Layne's justification for no-calling the play was one of two prevailing arguments that could be made concerning the play. This "no call is the correct call" line of thought makes for a tidy little package, but is, nonetheless, incorrect.

Wieters and Layne discuss the play.
Instead, "no call is the incorrect call" rules the day because, as Rule 6.03(a)(3) & (4) Comment ("If a batter strikes at a ball and misses and swings so hard he carries the bat all the way around and, in the umpire’s judgment, unintentionally hits the catcher or the ball in back of him on the backswing, it shall be called a strike only (not interference). The ball will be dead, however, and no runner shall advance on the play") makes no exception nor allowance for any issue of timing.

As Torre explained on Thursday to Chris Russo on the Mad Dog Sports Radio program, "The rule states...when the bat came around and hit the catcher's mask, it's a dead ball. And that's the one thing that should have taken precedence."

Essentially, the rule precludes the use of judgment other than to determine whether or not the batter's bat unintentionally hit the catcher (or ball) on the follow-through. If it did, then the play must be ruled follow-through contact and a dead ball. The only exception for this is found in the MLB Umpire Manual, and states that if the catcher's initial throw directly retires the runner despite the infraction, the unintentional follow-through contact is ignored and the result of the play (an out) stands.

That wasn't the situation during NLDS Game 5 (there was no "initial throw" and no outs were recorded), and Torre stated that Nats Manager Dusty Baker could have asked for a rules check if he felt Layne's call was wrong: "If you don't like what the umpire's telling you, ask him for a rules check. And they can do that. They can go to the replay center on the headset and check a rule."

Torre demurred, however, on whether he felt Baker's omission—combined with Layne's—helped contribute to Baker's new title of former Nationals Manager Dusty Baker.

Video as follows:

Leaping Laz - Pickoff Throw at Second Base Hits Umpire

After Astros pitcher Chris Devenski's errant pickoff throw struck 2B Umpire Laz Diaz, Dodgers Manager Dave Roberts fielded a reporter's question concerning the incident during his postgame press conference, conceding that, "Laz was in the right position," before graciously concluding with a smile, "that's baseball, things like that happen."

Houston skipper AJ Hinch quipped, "Laz was perfectly positioned, right where we wanted him."

Was Diaz properly positioned for the pickoff play at second? Let's review the sequence.

2B Umpire Laz Diaz jumps as a ball hits him.
The Play: With two out and the Dodgers having freshly tied the ballgame in the bottom of the 10th inning of Game 2 of the 2017 World Series, Astros pitcher Devenski attempted to pickoff baserunner R2 and potential winning run Kiké Hernández at second base. Devenski's throw to second baseman Jose Altuve was off the mark and to the left side of second base, where it hit 2B Umpire Diaz, who was moving into position to rule on the potential tag play at second base. After hitting Diaz, the ball bounced on the infield dirt, where it was retrieved by Altuve before any advancement by the runner. The Dodgers failed to score and the Astros ultimately won the contest, 7-5, in 11 innings.

Ruling Out Interference: Perhaps at this point it is just a formality, but we nonetheless should quickly address the issue of umpire interference, so as to rule it out. Official Baseball Rule 6.01(f) discusses two, and only two, scenarios when umpire interference may occur:
(1) when a plate umpire hinders, impedes or prevents a catcher’s throw attempting to prevent a stolen base or retire a runner on a pick-off play, or 
(2) when a fair ball touches an umpire on fair territory before passing a fielder. Umpire interference may also occur when an umpire interferes with a catcher returning the ball to the pitcher.
OBR also further discusses the first case in 5.06(c)(2): "The plate umpire interferes with the catcher’s throw attempting to prevent a stolen base or retire a runner on a pick-off play; runners may not advance. NOTE: The interference shall be disregarded if the catcher’s throw retires the runner."
Related Post: Rules 2.00 & 6.01(f): Umpire Interference (7/5/12).

Diagram of middle infield positions, B & C.
Positioning Analysis: With umpire interference ruled out, it follows that an umpire hit by a thrown ball is part of the playing field—the ball is live ("A pitched or thrown ball touches an umpire...the ball is alive and in play")—but this doesn't necessarily indicate Wednesday night's contact was unavoidable.

For plays with a runner on second base only, the MLB Umpire Manual recommends the second base umpire position himself inside the fielders, though umpires are not necessarily restricted to inside positioning if they are more comfortable outside.

This isn't the first deviation from MLBUM...
This is consistent with MLBUM's general principle that second base umpires are always in with runners on base (except a runner on third only OR an infield-in situation). Is there a two-out exemption? Not for a runner on second, though if the fielders aren't all that deep, that will dictate how deep a second base umpire will be, as an umpire should be out with a drawn-in infield.

Still, the issue isn't so much whether Diaz is in or out here, since, presumably, a drawn-in Diaz on the shortstop side would have simply had even less time to react to the wayward pickoff attempt. Again, it's probably more comfortable to be outside for this play (assuming a left side lock)—it might even help one stay away from a potential umpire interference situation on a batted ball up the middle—and that's quite alright.
Related Post: Much About Second Base & Stolen Pickoff Positioning (4/8/17).

Pick a Side: The question has to do with that great alphabetical divide, to B or not to B (to C)?

Which angle would be more helpful here?
Diaz takes this play positioned on the shortstop side of second base and outside, which gives him the advantage of not having to contend with second baseman Altuve running in toward the pickoff throw. We'll call this position "C-out."

However, taking the play from the left side also opens Diaz up to exactly what happened here—getting nailed by a poor pickoff throw. Taking the play from the right side, on the other hand, greatly weakens this possibility and can be beneficial toward getting an angle on the tag vs runner back into the bag.

Diagram of ordinary umpire positioning.
Refer to the "C Left / B Right" diagram, and imagine, if you will, the various angles that a second base umpire may have for a potential pickoff throw with the second baseman covering. The best angle is probably coming from deep B, inside of second base ("B-in"), while the worst may very well be a similarly right-side position, but well outside of second base.

The key is getting into position to see the leading, third-base-facing edge of second base—where percentages dictate the tag attempt most likely will occur. Recall from 2016 our discussion of the keyhole angle and our projected action area wherein an umpire reads the play and predicts where the imminent tag will occur before it actually happens.
Related Post: Tmac's Teachable Moments - Steal Plays at 3rd Base (7/21/16).

Find the keyhole to increase call accuracy.
The reverse angle of B-in is C-out (which is where Diaz approximately was), which should logically mean that C-out is second-best to B-in, right? If B is about halfway between first and second base, and deep B is further up the baseline/closer to second, then isn't C-out just a logical extension of the B-line akin to the first- or third-baseline extended position for a plate umpire (e.g., "really really deep B")?

Again, the issue isn't solely about positioning, it's about positioning in context of a projected play: If the throw is proper, does Diaz's position afford him the best opportunity to observe the keyhole angle?
Related Post: Tmac's Teachable Moments - Pickoff Tag at First Base (5/15/16).

Tie Breaker: With a tag attempt likely going toward B-in and away from C-out (swipe directionally will go from left-center to the right foul line), B-in is the better position: in general, a tag coming toward an umpire's vision makes the play easier to call and a tag going away is harmful (though a tag running perpendicular to the umpire's stance is ideal, as long as one can count on clearing the fielder or runner so as to actually see the play). Because the tag in this situation likely will be on the left side of the runner's body (the outfield side), viewing from the second base side is beneficial. However, if the throw and tag were to go right-left, C-side would likely fare better than B-side.

In Short: It's about umpire comfort and playing the percentages. Predicting a left-to-right swipe would be an argument in favor of B-in, while a right-to-left could swing things C-ward. For this particular play, assuming a proper throw, we have a pitcher who in all likelihood is throwing to the left/C-side of second base, a tag being made to the C-left side, and a left-to-right attempt (again, to clarify, left-to-right refers to the field... because Altuve is facing the reverse direction, the tag will run from the right side of his body to the left side of his body, or, conversely, left-to-right on Hernandez's body). Removing this assumption of accuracy from our arsenal, we're left with a poor throw to deep C, which means one thing: advantage B.

Video as follows: