NEW : The man initially arrested for the beating has been exonerated , but remains in jail . Two men have been arrested on mayhem and assault in the beating of Bryan Stow . Police say they are investigating whether a fight broke out between two groups at Dodger Stadium after Dodgers pitcher Stow is in a San Francisco hospital , recovering from extensive trauma from the attack .
NEW : The man initially arrested for the beating has been exonerated , but remains in jail . Two men have been arrested on mayhem and assault in the beating of Bryan Stow . A woman is also in custody and charges against her are pending , the police chief says . Stow is in a San Francisco hospital , recovering from extensive trauma from the attack .