20 Iconic Athletes That Were Unfortunately Made of Glass

Earl Campbell

Image Source: John David Mercer/USA TODAY Sports

The running back position is painfully cruel to its users. With one bad cut or one awkward tackle, even the most talented of backs can suffer majorly debilitating injuries. At 5-foot-11, 230 pounds, the bruising Campbell was built like a tank. He began his career with four straight seasons of at least 1,300 yards and 10+ touchdowns.

By the age of 30, Campbell was out of the league, citing the punishment and ailments he suffered after taking 2,187 career carries as the major factor.