Michael Montgomery, 21, was arrested last September but then released, with officials saying they lacked the evidence to charge him.
Montgomery was one of two men held for questioning after the stabbing death of Jonathan Denver, 24, after a Dodgers-
Denver, who was dressed in Dodgers apparel, was stabbed during an altercation with a group of Giants fans over teams rivalry, police said.
At the time, police officials said they were still looking to interview two others who were with Montgomery on the night of the stabbing.
Montgomery's father, Marty Montgomery, told media outlets his son phoned him sobbing from police custody to say he had stabbed Denver in self-defense.