Police have several people in custody and are not currently looking for other suspects. None had been formally charged as of just after midnight.
A police spokesman says one of the victims was initially in critical condition, but all are conscious and talking. He describes the scene as "chaotic" and says police are trying to figure out what led up to the fight and whether the men had attended the game.
The Broncos lost the game, 27-20, to the San Diego Chargers.