What to do when your pee wee football coach's action upsets you?

My son had his final pee wee football playoff game yesterday, his team lost three touchdowns to nothing. Toward the end of the game, 4th quarter, there was an injured player, they had all the boys take a knee while they looked at this players leg, then a couple of the coaches carried this player off the field towards the benches, they had to walk where they had the team kneeling, my son, I'm guessing, wasn't moving fast enough so one of the other coaches physically grabbed the back of his uniform, lifted him up and moved (more like tossed) him out of the way, there were a few other kids in this area too that didn't get moved this way. I realize the coach was very, very frustrated because as he said "the team wasn't playing like they were there to play" but my son didn't even play in this game at all. Should I say something to this coach? I know my son, just by the look on his face, was embarred by this just by the fact in was done in front of a full stadium and all his team mates. Or should I just let it go?