Former LSU cornerback Morris Claiborne was involved in fight during the Cowboys and Raiders joint practice on Tuesday. Per ESPN
The brawl started when Cowboys cornerback Morris Claiborne slammed Raiders tight end Mychal Rivera to the turf by the sideline, just a few yards from a section of the crowd that was predominantly Raiders fans. There was an agreement that there would be no tackling at the practice, but Claiborne said he decided to take down Rivera after the tight end lowered his shoulder.
After Claiborne walked over Rivera and celebrated his tackle, Oakland receiver Greg Little rushed over to confront the cornerback. Within seconds, dozens of Dallas defenders and Oakland offensive players were brawling within reach of fans behind a fence.
Here is video of what happened: