When Mariano Rivera saved his 602nd game earlier this month, he solidified his position, although there should not have been any remaining doubt, as the greatest closer ever. One of the many interesting things about Rivera’s career is how he transitioned from a 25 year old with a 5.51 ERA in 19 games, including ten starts with 51 strikeouts and 30 walks over 67 innings in 1995, to becoming the best setup man in the game in 1996 and the best closer ever from 1997 to the present. Whoever decided to put Rivera in the bullpen full time made a very wise decision leading to one more Yankee Hall of Famer and contributing to five more Yankee championships. Interestingly, roughly a decade earlier, a similar decision was made with another Yankee pitcher which dramatically affected that pitcher’s career trajectory and contributed to the Yankees failing to make the post-season in the mid 1980s.