A former wide receiver for the St. Louis football Cardinals is suing the NFL. He and seven others claim the league illegally used pain killers to mask their serious injuries.

Roy Green was a wide receiver for the Cardinals from 1979 to 1987. He says he developed calcium buildups on his Achilles tendons. But instead of surgery, doctors and trainers gave him pain medication.

Green says he's suffered three heart attacks, has high blood pressure and needed a kidney transplant.

"Basically what you have in the NFL is a bunch of anesthetized players and basically what you have is a bunch of gladiators going out there every week and the NFL is simply putting profit before players," said Steve Silverman.

In a recent study, researchers at Washington University first brought this troubling issue to light. They found 71 percent of NFL players who used prescription pain meds misused the drugs.

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