Vikings defensive tackle Sharrif Floyd is dealing with a nerve issue in his right knee after having surgery to clean up his meniscus last September, according to a league source.
The nerve issue is preventing Floyd's quadriceps muscles from working properly and could be career-threatening, according to the source.
USA Today first reported the details of the injury.
Floyd posted a message on Instagram last week that suggested he might be headed toward a career crossroads.
The Vikings have said he is continuing to rehab; Floyd was seeing specialists for much of last season, after only playing in the team's first game of the season.