We won the game so this is not sour grapes or excuse making. I was watching the game in a public setting and could not hear the announcers and could rewind.
1. Roughing the passer - To me it looked like the QB still had the ball when he was hit. Did the defender do something like lead with his head?
2. Horse collar - looked to me that he had the guys shoulder pads not his jersey.
3. Tripping - happened fast and I only saw it once. It looked like it was inadvertent. He certainly didn't stick his foot out as the defender was running by (not that that is the rule, it just didn't look blatant).
4. Roughing the kicker - looked more like running into the kicker and even weak for that. The punter flopped like a champ though
Even if all these calls were bad the guys did the right thing and won the game anyway. It just can be a little frustrating, especially when you have a few beers in you.
Overall, we had 60 yards worth of unsportsmanlike conduct and they all seem to happen at unfortunate times. Not a conspiracy just a huge hill to overcome.
Along with being on the road against a big 10 opponent and no kicker, I think we did pretty well overcoming adversity.