The Pittsburgh Post-Gazette first reported the incident, which occurred Oct. 21. Charges weren't filed until Thursday night. The three players were not arrested, but will receive summonses that require their appearance at a preliminary court hearing on Jan. 9.
Pitt released a statement Friday saying each player denies involvement in the incident and will play against the Irish.
Police wrote in a criminal complaint that they tried to disperse a crowd in the Oakland area of Pittsburgh when three people remained. One of them, Karl Olsheski, told police he had just been assaulted by Street, who reportedly punched him on the side of the head. Graham reportedly uttered a racial slur at Olsheski just before Street assaulted him.
All three Pitt players are starters. Street and Graham have been two of the best offensive players for the Panthers this season. Street leads the Big East with 50 catches for 695 yards, and has four touchdowns. Graham has 622 yards and seven touchdown runs, a year removed from tearing his ACL. Pitts has started all eight games this season, with 21 tackles and a forced fumble.