Here a balk, there a balk...

[NFump]

[quote=cbfoulds]

Originally Posted by orioles35

I don't know what the exact rule is, but it reads something like "once a runner has legally obtained a base, he cannot retreat to a prior base after the play has ended" (leaving the door open for a runner to retouch DURING a play, if necessary).
QUOTE]Godd reason why you "don't know what the exact rule is ...":
Ain't no such rule in baseball for a sitch where the ball is live.

IF THE BALL BECOMES DEAD after a runner acquires a base, a runner cannot return to retouch a base that was missed or left early [unless required to return by a "runners return .." type of penalty /award].

7.01 casebook comment. If a runner legally acquires title to a base, and the pitcher assumes his pitching position the runner may not return to a previously occupied base.