If getting arrested for a barfight is a true character concern, the NFL has some serious problems on its hands.
They're 300lb behemoths and unlike most people, they get arrested because when they hit you, you don't get up. There's a fight a night at a lot of clubs, and a lot of times it's just WCMS (white christian male shoving) but when someone's 270lbs he's unlikely to back down or just push.
But I'm not condoning it. You should be aware of your status as a representative of your team and a future NFL player. It better not happen again but a few college bar fights aren't exactly ridiculous criminal material. I'd be more worried about domestic abuse, fraud, theft, etc. Those call your character into question. If you got arrested for the fight, you probably won :)