It happened at Keck Park in Coalinga Friday night, at the intersection of Monroe and Coalinga streets.
Investigators at the scene say the victim was playing basketball when he was approached by a group of suspected gang members.
They started beating the man with a baseball bat and then stabbed him to death.
Authorities detained two people for questioning, but the investigation is still ongoing.
Stay with Action News and ABC30.com for updates on this developing story.