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Every time Mariano Rivera blows a save, people are amazed. 

Through Sunday, Rivera has 557 saves in 605 opportunities. Since becoming a full-time closer in 1997, that means he is averaging 3.4 blown saves per season, which is a remarkable number.

Yesterday was the fourth blown save for Rivera, who has never blown more than seven saves (2001) and last year blew two out of 46. All of this is astounding for a man, who was left unprotected by the Yankees in the 1992 expansion draft. Further proof if the Rockies or Marlins knew then what all of baseball knows now.

The best indication of how challenging an occupation closing is and how great Rivera’s career has been is to look at every team’s closing situation in the last 14 years. That means finding the guy who led the team