[Rich Ives]

Originally Posted by Manny A

True. But in this case, R2 started at second base on the pitch. He cannot legally return to first base when play is complete.

Of course, I'm assuming by "R1 and R2", he meant that R2 was the runner who started out at second base, and not at first base.

I'm not sure what the FED rule is, but in OBR, it's the Rule 7.01 Comment.

My take: It was a new play. The clock starts over.