seems to me that this would be the time the rule 10-3-c should be invoked and the runner returned to first.. it talks about an umpires delayed call putting the offence or defence in jeopardy....what am i missing?
I did find an ASA case play that was similar to the OP. In the case play it is initially called a ball and R1 leaves first, catcher immediately requests an appeal and base umpire calls the swing. Catcher throws to 2nd for the tag out on the runner advancing. In the case play it does say since the reversal of the call put the runner in jeapordy rule 10-3-C should be used and place the runner back at 1st. So there does seem to be case play support for returning the runner to 1st. Question is, in the case play the appeal was made in a timely manner while in the OP it is pretty clear the runners had all advanced and the umpire was moving to a new position prior to the appeal. So, does the delay in making the appeal change how the play should be ruled?