McGregor was arguably the UFC’s first mainstream superstar. The Irishman was a two-weight champion and had incredible charisma. But he went from hero to villain with his antics outside of the cage when punched an old man in a bar (via Daily Mail).
Meanwhile, he became involved in multiple unsavory legal issues. These included sexual assault allegations and multiple speeding offenses. A woman also accused him of impregnating her at a party in Liverpool.
Hernandez and Rob Gronkowski struck fear into the hearts of opposition teams. The Patriots duo were two of the best tight ends in the sport. However, Hernandez never achieved his full potential because he was a murderer.
On paper, Hernandez was a phenomenal athlete, who combined wideout speed with tight end strength. However, his struggles evolved into something much more toxic. He should have been one of the Pats’ biggest heroes (via Fansided).