checked swing removing a walk

[Dakota]

Originally posted by DaveASA/FED
Just to make sure I am following you all. You would call a dead ball and reset the field (R1 at first) and BR at the plate? No matter if R1 was safe or out at 2nd? What if it was a passed ball? And if you would reset R1 is this different than a runner taking off to 1st on ball 3 thinking it's 4 in that this was an umpire act that changed the count not a player/coaches screw up?

Taking your last question first, the rule (10-6C) only applies if the umpire makes a delayed call (e.g. late calling of a dropped infield fly results in runners advancing because they think they are forced & being put out) or a reversed call (the situation discussed in this thread). If the batter has the count wrong and advances on ball 3, then that is a live ball play and whatever happens, happens.

Your first question, application of 10-6C is a judgment call as to whether anyone was placed in jeopardy. In the case of a wild pitch or passed ball, the umpire may very well rule that the defense was not placed in jeopardy wrt the runner's advance - that was due to the WP/PB and not the changed call, and leave the runner on 2nd.