83 more former NFL players add names to concussion lawsuit

Ex-Redskins RB Clinton Portis added his name to a concussion lawsuit against the NFL. (Larry French/Getty Images)

Former NFL players Clinton Portis, Daunte Culpepper and Cadillac Williams are among 83 players who added their names to a lawsuit accusing the league of being negligent about the dangers of head injuries while playing football.

More than 4,500 former players are now on the lawsuit, where the litigation has been consolidated in U.S. District Court in Pennsylvania. In July, a judge ordered both sides to mediation and a progress report is due Sept. 3.

In a new 128-page complaint obtained by the Washington Times, Portis said he suffers from headaches and is at a "heightened risk of developing further adverse neurological symptoms in the future.”

Portis, who rushed for 9,923 yards in his career with the Denver Broncos and Washington Redskins, told CBSSports.com in June that he estimates that he had at least 10 concussions during his playing career.

"The truth is I had a lot of concussions,” Portis said. “It was just the way things were at the time. I’d get hit hard and be woozy. I’d be dizzy. I’d take a play off and then go back in. Sometimes when I went back into the game, I still couldn’t see straight. This happened all the time. Sometimes once or twice a game.”