One of the shooting victims was listed in critical condition late last night.
The San Francisco Chronicle adds that one person has been arrested.
Police detained a suspect shortly after the shooting - a man wearing Raiders apparel who was found on a party bus in an RV section of the parking lot, according to San Francisco police Sgt. Frank Harrell. Harrell spoke to reporters outside the stadium.
A second shooting victim was found near Pole V in the parking lot, Harrell said, and had superficial wounds to his face. He was listed in stable condition at S.F. General.
In addition, according to Bay City News, a San Rafael man, 26, was assaulted and knocked unconscious in a restroom at Candlestick during the game, police said. He was taken to the hospital with life-threatening injuries.