Just minutes after taking the field, a joint practice between the teams turned into an all out WWE style brawl. Hit the jump for details.

According to Bleacher Report:

The Dallas defense and Oakland offense got into it when Cowboys cornerback Mo Claiborne put tight end Mychal Rivera on his back, then barked at the crowd, according to one report from Tim MacMahon of ESPN.

As the fight got bigger, the players pushing and shoving appeared to get very close to fans.

Sidenote: Mychal Rivera is the younger brother of Glee star Naya Rivera-Dorsey.

We wonder how the league plans on responding to both fights since fans were dangerously close to the action.

Click above gallery for pictures.

Tavia HartleyIFWT