In what was supposed to be a non-tackling practice, Cowboys cornerback Morris Claiborne took Raiders tight end Mychal Rivera to the ground near the sideline, sparking a brawl between Raiders offensive players and Cowboys defensive players.
A fan also got involved, according to ESPNDallas.com. An unidentified Raiders supporter hit Dallas cornerback B.W. Webb twice with his hand and once with a helmet before Webb reacted and the brawl ended.
"Two teams going after it and happened to be some fans, too," Webb said. "Hey man, it happened. I wasn't expecting that. But whoever jumped on my back, I had to get them off. Hey, you got to let them know, man, the only thing protecting you is this fence."
Another scuffle broke out at the end of practice between Dallas's offense and Oakland's defense.
The teams are holding joint practices Tuesday and Wednesday at Cowboys camp in Oxnard, Calif.
- Ben Estes