|Umpire Jon Byrne, 1st MLB Aussie Ump.|
Byrne was born in Perth, Australia and becomes the first Australian native umpire to officiate in the Major Leagues. In Australia, Byrne got his start with the WA Baseball Umpires Association in 1998 after which he attended umpire's school in Adelaide; he worked the 2007-2010 Claxton Shield and 2011-2012 Australian Baseball League (ABL).
He resides in Charlotte, North Carolina and wears the sleeve uniform number 59 at the Major League level. The 5-foot-10, 143-pound May, who makes his MLB debut at the age of 30, will turn 31 in June and has an identical twin brother Kyle, who also officiated in Minor League Baseball.