Replays also indicate Bryant's right hand, in its attempt to return and reclaim third base, actually pushed and slightly displaced the third base bag, possibly causing his hand to break contact with the base as Prado attempted to tag Bryant. In any case, the base appeared to move as a result of Bryant's actions. The following rules govern the case of a dislodged base:
First, second and third bases shall be marked by white canvas or rubber-covered bags, securely attached to the ground as indicated in Diagram 2. The first and third base bags shall be entirely within the infield. The second base bag shall be centered on second base. The bags shall be 15 inches square, not less than three nor more than five inches thick, and filled with soft material."
Rule 5.09(b)(4), The runner is out when: "He is tagged, when the ball is alive, while off his base.
APPROVED RULING: (A) If the impact of a runner breaks a base loose from its position, no play can be made on that runner at that base if he had reached the base safely."
APPROVED RULING: (B) If a base is dislodged from its position during a play, any following runner on the same play shall be considered as touching or occupying the base if, in the umpire’s judgment, he touches or occupies the point marked by the dislodged bag."
Second, Bryant, by virtue of his momentum in sliding past the base, did not necessarily "reach the base safely," as in 5.09(b)(4) AR (A), but possibly did occupy the point marked by "the dislodged bag," as in AR (B). Note that (B) applies to a following runner, though if, in the umpire's judgment, Bryant touched or occupied the point marked by the dislodged bag, he may be declared safe. This is a judgment call, though bear in mind, pursuant to Diagram 2, the bases are intended to be stationary and flush with the foul lines.