2. Michael Jordan

Sport: Basketball
Retirement Age (Career): 30 (1985-1993)
In October of 1993, while in his prime and fresh off winning his third straight championship, Michael Jordan retired...to play baseball. His father's murder earlier that year weighed heavily on his decision as did his pop's dreams of Mike playing in the MLB. At the time of his announcement, Jordan was considered by many to be the GOAT without much argument. After a lackluster stint in the minors, he later returned to the NBA in March of 1995 and went on to lead the Bulls to another three-peat, solidifying his legacy as the best ever. We'll just act like those years in Washington never happened. Fuck you, Wolf Blitzer!