Can I sue after being maliciously attacked?

I was involved in a fight outside of a local bar where I was attacked by a 33 year old man. I am 21 years old and I did nothing to provoke any of the events that happened. I was hit numerous times and ended up in the hospital with a concussion. (All documented with papers.)

The police came and received the story from numerous witnesses, many being my friends, and two others being the employees. The story stood that I was "defending myself and did nothing to provoke the incident."

He claimed that I was giving his wife a hard time and thats why he hit me, but due to the great resource of Facebook, the girl he was with that night was in fact NOT his wife.

Do I have a case to sue this man?