An ex-NFL player is in legal hot water for collecting disability benefits, then appearing on the grueling "Survivor" reality show.

Greta Van Susteren explained (watch above) that Brad Culpepper is facing a civil lawsuit over his disability claims after he appeared to be very physically fit on TV.

Culpepper is accused of fraud by an insurance company that paid him roughly $175,000 in workers' compensation after he claimed an 89 percent disability rating for injuries suffered in the NFL. 

ABC News reported:

According to a civil lawsuit, Culpepper told doctors of “low back pain and stiffness which is almost always present,” and said he had “quite a bit of difficulty... getting into or out of the bath and performing heavy activities around his home.”

Yet, on the Survivor episode, aired in 2013 and filmed on a remote island in the Philippines, Culpepper leads his team through a series of strenuous tasks: paddling a canoe, diving under water repeatedly, retrieving large crates and stacking them on the shore.

In his first public comments regarding the lawsuit, the former defensive lineman told ABC News that he was on pain medication and had undergone a back procedure right before appearing on "Survivor."  

Culpepper, who is now an attorney, then took his shirt off in an attempt to show the injuries are legitimate.

“This whole lawsuit is ludicrous. I've worked too hard in my life to have this as a headline," said Culpepper.

Watch the interview below.