Former Detroit Lions linebacker DeAndre Levy has filed a grievance against the team after being released in March, ESPN reported.
Levy missed 11 games last season after undergoing September knee surgery, and required a second procedure to repair a torn meniscus again after he was released at the start of the league year.
The Lions passed Levy on his physical before releasing him, nullifying the $1.75 million injury guarantee in his contract for this season.
Levy did not return phone or text messages from the Free Press Tuesday, but he previously told the Free Press "there was more going on than I was being told" with his knee.
"My main focus is to actually heal and get healthy under trusted physicians," Levy said in April.
Levy, 30, is not expected to play again, though he has drawn interest from several teams.
He was a Pro Bowl-caliber weakside linebacker in the 2013-14 seasons, when he totaled 270 tackles and seven interceptions.
He missed most of the 2015 season with a hip injury, and underwent knee surgery last year after returning in Week 1.
Today, Levy told ESPN that he blamed the Lions for his plight.
"In the moment, they tell me I can't make it worse," Levy said. "The doctors are telling me that, the coaches are telling me that, like the doctor is saying I can't make it worse and now, I can. For my long-term health, yeah, I regret it. ... I was just trying to prove I could be out there and help the team win, and hopefully that would be some saving grace for next year, like I was still trying to battle it out for everybody.
"But now I'm stuck sidelined, struggling to get up and down stairs."
The Lions declined comment.