A group of men brawled with ten youths at the Crocker Amazon Playground late Wednesday evening, police said.
At some point during the scuffle in the park near Geneva Avenue and Prague Street, one of the youths flashed a handgun before continuing to fight. By the time officers arrived around 7:27 p.m., one of the men had been pushed down a flight of stairs that leads from the park onto Geneva Avenue.
When police arrived the 30-year-old man was on the ground unconscious and being treated by medical personnel. He was taken to San Francisco General Hospital with a bleeding head.
No one was shot during the incident. No arrests were made.