Retired Washington Redskins running back Clinton Portis joined the concussion litigation group, suing the NFL, according to the Washington Times.

According to the report, Portis is the lead plaintiff in an 83-player lawsuit filed in U.S. District Court for the Southern District of Florida.

The lawsuit alleges that Portis is dealing with headaches and is at “at heightened risk of developing further adverse neurological symptoms in the future.”

“The NFL was great to me and so was the Redskins!” Portis wrote on his Twitter account. “This not personal it’s protection for the future. This is not about money for me I’m doing just fine!”

Portis told CBS in June that he had at least 10 concussions in his 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.”

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Aaron Wilson covers the Ravens for The Baltimore Sun.