So I think this came up during the USC/Stanford game. A guy was screaming for a horse collar penalty, then on the replay it looked like the runner may have stepped out BEFORE the penalty.

My questions is, if a challenge reverses a play to BEFORE a personal foul, is the flag picked up?

College and NFL answers accepted.

9/17/2012 10:52:25 PM

maybe not that kind of penalty, since it's to protect a player from injury

9/17/2012 10:53:35 PM

A horse collar foul can be called even after the runner steps out of bounds.

I believe the answer to your bigger question is yes. For instance a block in the back after an interception would be waved off if the interception was deemed incomplete on replay.

[Edited on September 17, 2012 at 11:03 PM. Reason : Example]

[Edited on September 17, 2012 at 11:05 PM. Reason : V yes it would be fifteen on to the end of the run.]

9/17/2012 10:59:34 PM

that makes sense. so it would prob be added on to the new spot.

9/17/2012 11:03:22 PM