#3 Alberto Del Rio (Released by WWE in 2014)
When Alberto Del Rio debuted on the WWE RAW main roster in 2010, he was instantly pushed like the foreign villains of the past. Despite his stereotypical gimmick, he was a fantastic wrestler. It seemed like he was destined to enjoy a lot of success in his WWE career. While he did become a four-time heavyweight champion, he received start-and-stop pushes that didn't go anywhere.
But a heated incident in 2014 forced the company to fire him. Del Rio claimed that an employee said something racist, so he confronted and eventually attacked the individual. He elaborated on the controversial incident in an interview after the company fired him.
Del Rio was unhappy with his release, as he believed he did the right thing by calling out racism. Despite the incident, the Mexican Superstar returned to WWE in 2015, though his second stint lasted just over a year. Since 2018, Del Rio has hardly wrestled, and he does not currently have a contract with a wrestling promotion. He has been at the center of a few legal issues in recent years.