One of the most self-sacrificing—read: craziest—players from that era, Jack Youngblood, played through the 1979 playoffs and 1980 Pro Bowl with a broken leg. (That’s right: he played through a severe injury in the Pro Bowl). Last year, Youngbloodtold the New York Post that guys who missed time with an injury back then didn’t just have to explain themselves to their untrusting employers—they had to explain themselves to their own teammates. Rather than fake injuries to swindle their way into bogus workers’ compensation claims, it has always been much more common for NFL players to fake health.
In the same New York Post story, Antrel Rolle says he hid not one, but two rotator cuff tears from team doctors. In 1974, the team doctor for the Los Angeles Rams told the Washington Post that he’d learned to check both legs for injuries because limping players liked to trick him by presenting the wrong one. The marginal guys, it is generally understood, are the most likely to fake good health, knowing how tenuous their hold on a roster spot can be.
Most of the rest of the quite interesting article details a case of a player who was administered truth serum in 1986. The full article, by Andrew Heisel, is here.