1. Billy Collins Jr.
Billy Collins Jr. was an up-and-coming boxer that was never able to reach his full potential. In 1983, Collins was set to fight Luis Resto. On the night of the fight, Resto seemed to punch heavier and more solid than he ever had in his career.
After the fight, it was found that Resto had removed padding from his gloves. Collins suffered a detached iris and permanent blurred vision. He would never box again and later died in a tragic car accident.