McG could have avoided him... it was a bad call, but you are right... shouldn't there have been a illegal block in the back called?
I'll tell you what McG was trying to do... he was trying to time it perfect, and 1/2 second later and it would have been a great LEGAL hit.. and the guy would have still probably fumbled... maybe, just maybe if he wasn't given that extra push, he would have been there just a split second later, maybe enough time for the returner to get a hand on the ball first...
But really, the way it played out it was a bad call.. and i would have been very pissed if it was the other way around.