This morning Buster Olney of ESPN tweeted, “Because of the difference between Rivera and others at his position, for me, he should be part of NYY’ Rushmore, with Ruth, Gehrig, DiMaggio.” I find this an interesting claim in a lot of ways. First note the 4 players: Ruth, Gehrig, DiMaggio, Rivera. I would without a second thought shove Mantle ahead of both DiMaggio and Rivera. Second, I take his claim to be that the dropoff from Rivera to others refers to all other relievers, not just all other Yankee relievers. That follows an earlier tweet which said, “The difference between Rivera and any other player at his position in history is the greatest of any position.” That is a more interesting question. To get a quick and dirty look at the drop from the best to the second-best at various positions, I’m going to do a bit of fiddling with WAR, as measured on Baseball Reference. I will also summarily exclude 19th-Century Players. (This means I excluded both Cy Young and George Davis.) The method is simple: Take the WAR of player 2, divide it by player 1, and multiply by 100. This gives the second player’s production as a percentage of the first player. So, is the dropoff from Rivera the biggest? Let’s turn to the stats.
|Player 1||WAR 1||Player 2||WAR 2||Percentage||Total Drop|
First, these are full career WAR stats, so Ruth has a serious bump from being a pitcher, and Walter Johnson gets a nice little bump from his hitting. Second, I calculated relievers three different ways. First, I ran Rivera against Gossage, the two highest pitchers who accumulated almost all their WAR in relief. Next I did Rivera against Eckersley, because Eck had the highest WAR of any pitcher who is in the Hall of Fame as a reliever. Nonetheless, his WAR is so high because he gets a giant boost from all of his years as a starter. Finally I compared Rivera to the next highest modern closer, that is the highest WAR from a reliever since the advent of the modern closer circa 1980. That would be Trevor Hoffman. So where does this get us?
First, the drop at shortstop is gigantic. Even adding George Davis back in doesn’t help much. That is the lowest percentage drop among position players. Next, the drop from Ruth to Aaron is impressive. It is the largest raw WAR drop, and the third lowest percentage. Quite a drop considering this is Hank Aaron we are talking about. Finally, relievers are tricky. First, if Eckersley is included, Rivera isn’t the best ever. Next, if you include higher inning relievers from the 1970′s, the percentage is not the lowest, but it is second. Finally, if you limit Rivera to his most comparable group, other closers, you see Buster Olney’s point in big numbers. Rivera is nearly twice the pitcher of any other closer, when measured by WAR. I find that fact astonishing.