Mariano Rivera became the first unanimous Hall of Famer in MLB history after receiving all 425 possible votes from the Baseball Writers' Association of America. The legendary closer finished his 19-year career with a record 652 saves, all with the New York Yankees. Rivera's dominance on the mound included a record five World Series titles and a 0.70 ERA in the postseason. His cutter became one of the most feared pitches in baseball history.