23. Cadillac Williams
Williams looked like he had the whole package. First, his nickname was outstanding. That’s enough to get anybody’s attention. Then he had a great rookie season for the Tampa Bay Buccaneers. He rushed for 1,178 yards and scored six touchdowns to make his presence felt.

But this Cadillac definitely wasn’t reliable. Williams’ numbers plummeted in his sophomore year as he rushed for less than 800 yards. He carried the ball a lot but was unable to do anything with it most of the time. To sum up, the running back’s career ended with a whimper after another few seasons.