He was beaten unconscious when two groups of college football fans began fighting in the parking lot.
It happened Saturday after the opening day football game between UC Berkeley and Cal State Fresno. Police say fans from both teams started fighting and the victim was hit.
One man was arrested after witnesses pointed him out to police.
Just two weeks ago, violence marred a preseason game between the San Francisco 49ers and the Oakland Raiders. Two men were shot in the parking lot and another knocked unconscious inside a stadium bathroom.