Williams required stitches to his head after the brawl last week at Honolulu's M Nightclub.
Hawaii News Now reports that 25-year-old John Blayne Stancil, of Waimanalo, turned himself in at the Kailua police substation on Monday night. He was booked on two counts of third-degree assault.
Police earlier arrested 40-year-old Michael Butendah, of Kaneohe, and M Nightclub part-owner Michael Miske Jr. Both have been charged with assault. Police say Miske hit Williams over the head with what investigators say was "a dangerous instrument."
Miske is free after posting $250,000 bail. He is scheduled to make a court appearance Monday.
Copyright 2013 by The Associated Press