You mean The Hillside Strangler. A few of the Hillside Stranglers victims were found very near Dodger Stadium
That's true. LA had a series of serial killers in the '70s, sometimes more than one at the same time, sometimes serial killer teams at the same time. Michael Bonin and his followers, and the Toolbox Murderers, Lawrence Bittaker and Roy Norris. Son of Sam was small potatoes compared to LA.
Although there's quite a bit of evidence that Berkowitz was not acting alone, and was not the only shooter.