Cornelius Johnson, 29, was shot multiple times about 4 p.m. Sunday near the park's basketball courts at 5650 Bethune Court, said San Diego police Lt. Kevin Rooney.
He was pronounced dead at the scene at 4:21 p.m., Rooney said.
Johnson reportedly had gone to the park to play basketball, he said.
Three males were seen running to a late-model, light-colored car parked on Tooley Street. The suspects' vehicle was last seen traveling eastbound on Tooley Street, Rooney said.
A motive for the shooting was unknown.
Anyone with information on this shooting was asked to call the San Diego police homicide unit at (619) 531-2293 or Crime Stoppers at (888)580-8477.