I've thought about this more, and here's what I've got. Even if I think that CT affects defense, that shouldn't affect fouls, because the fouls would largely be called when the team who is CTing is on offense. So you'd argue that CT would make your offense better (thus causing the opponent to commit more fouls) not the other way around.
Unless you think that CT causes your opponent to commit more fouls, but that doesn't make sense to me, and I have proof to back it up. I check several of sharkboy's previous games, and here is the number of fouls he commited:
25, 22, 20, 27, 28, 23, 20, 19
This leads me to believe he just has really bad defenders or bad stamina, or both, and that if there was a CT involved, it had nothing to do with the amount of fouls called.