As SFist's 49ers reporter Daisy Barringer can attest, violence at Candlestick Park is an increasingly dangerous problem.

In addition to Barringer's assault, which you can read all about here, a 40-year-old Niners fan suffered a concussion as well as a broken arm and nose at the Stick on Sunday.

SFGate has more:

The assault on the man — who police originally identified as a 15-year-old boy, but later corrected to 40-year-old man — happened early on in the game. Police say a 29-year-old man was arrested on suspicion of beating the man for allegedly urinating in his car.

The above photo also showed a scuffle between two unidentified men at Sunday's game. Deplorable.

Security was beefed up at the soon-to-be-demolished stadium a couple of years ago after two shootings and a brutal beating erupted during a preseason game with the Oakland Raiders. Sounds like they could use more.