I'm still waiting on you to define fair fight.
Hard to really know what happened w/o being their and not hearing anything. Clearly something was said between the two. Cowan walked between the guys, perhaps he said something, perhaps the other guy did first.
I don't think this is worth getting kicked off the team, but that's me. Kids fight, always have...not to mention, things can get sideways at a bar when folks are drinking liquid courage.