Fans were involved in a wild brawl at the 49ers-Cardinals game. (YouTube)
Fans were involved in a wild brawl at the 49ers-Cardinals game. (YouTube)

A wild brawl broke out on Sunday between Cardinals and 49ers fans at University of Phoenix Stadium. It's not clear how the brawl started, but a YouTube video shows that things got pretty serious after one fan was pushed and fell down two rows of seats.  

As the fight began to escalate, it moved from the seats at the stadium to some concrete stairs. Concrete stairs are not forgiving and as you can see below, at the end of the fight, the stairs were covered in blood. 

This was the scene after the brawl at the 49ers-Cardinals game. (YouTube)
This was the scene after the brawl at the 49ers-Cardinals game. (YouTube)

At one point, a fan starts choking the lone security guard [pictured above] involved in the melee. The security guard, wearing a blue shirt, was eventually saved by a Cardinals fan wearing a Darnell Dockett jersey.

Dockett, who's obviously seen the video, took notice of the guy who helped the security guard and made him an offer on Twitter. 

By the time the brawl was cleared up, the security guard was covered in blood as he stood over the concrete steps that were also drenched in blood. 

You can see the entire video below, but keep in mind, it can be graphic at times.