A police spokeswoman said late Friday that the fight was between feuding fans and that the shooter was rooting for the San Francisco Giants. But police said Saturday they were still investigating the motive and that it was unclear whether baseball was the issue.
Mark Antenorcruz, 25, of Covina, was shot once in the upper body about 10 p.m. Friday as he headed for his car after attending the game, police and county coroner's Lt. Gary Kellerman said. He was taken to a hospital where he was pronounced dead.
Police spokeswoman Lucy Diaz said Saturday that the victim had been in a shouting match with the three suspects, two men and one woman, and that one of the suspects went to his car, pulled out a handgun and fired.
One of Antenorcruz's companions told a passing driver about the shooting and the driver pursued the suspects' vehicle and wrote down its license plate number. Police used it to track down the suspects.
Diaz said it was unclear what charges would be filed.
Neither baseball team commented on the shooting.
The Giants, who won the game 6-4, had already clinched the National League West on Wednesday. Friday's loss, meanwhile, dropped the Dodgers three games behind Philadelphia in the National League wild-card race.