There is no rule that says, as a defender, you have to let a receiver run through you to get to the ball. The ball landed to the far side of the defender. Plus he got his head around. Was there illegal contact? Yes, but it was mild. There is some hand fighting that happens every play. I support the no call, but had it been called, I wouldn't have complained either.
I completely agree, but the problem is the refs in college football are inconsistent. It shouldn't matter if you get your head around or not...when balls are under thrown and they hit defenders in the back it should not be PI...
All too often I see this happen where a receiver is up in the air and the ball bounces off the defender and the flag is thrown...and I often look at it and scratch my head while I try to figure out how in the hell the receiver was going to catch the ball if the defender wasn't there.
The rules these days severely favor the offense, which makes late comebacks that much easier...it's just plain silly.
May not be the best spot for this comment, but there are times when committing PI is a good thing in college. Perhaps on the jump ball, for instance. When that guy goes up and it's clear you have no play on the ball, just freakin' tackle him and take the 15 yard PI. Much better than giving up 30+ yards when the opponent is struggling to comeback.