We lost one game by 7 and one game by 4. So had we made an easy fg, which game would we have won? I am assuming you are guessing Toledo? But we lost by 7 so a field goal would have meant we would have lost by 4. Oh you are assuming the same course of events where Toledo was trying to run the clock out and would have fumbled and then we smartly would have downed the ball? There are a lot of mental gymnastics to get there as the game would have looked completely different. Would we have won had he made the fg? Maybe. Maybe not. I honestly have no idea. The game would have been 100% different.
Which special teams tackle in the USF game would have made a difference? I don't even know what you are talking about there.