A Centennial High graduate has been arrested for allegedly assaulting and knocking out a Santa Barbara police officer. 

According to the Santa Barbara County Sheriff's Office, 18-year-old Isaac Brown was involved in a street in Santa Barbara on Saturday night. 

SBCSO says Brown, who is 6-foot-3, 225 pounds and plays football at Santa Barbara City College, was in the middle of the fight, which drew several hundred people at an intersection. When officers approached the crowd several people took off running. Brown appeared to be chasing after someone. 

When two female officers approached Brown, they say he began to resist their efforts to detain him. Wearing a long-sleeve shirt, Brown tried to take it off while it was being held by officers, but it got caught on his wrists. He then used the shirt to pull one of the officers to the ground. The officer lost her balance, fell, hitting her head on the bumper of a parked truck, knocking her out for several minutes. 

Brown then left the scene as other officers tended to the officer who was knocked out. That officer was taken to a hospital and treated for a concussion. 

Brown was later arrested and now faces charges including resisting arrest causing serious bodily injury and dissuading an executive officer by force. He's being held on $25,000 bail.