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The Ensured Loss
This is a follow-up inspired by K-Man’s article on BJ Ryan and specifically the discussion about use of relief pitchers and the statistics used to measure their usefulness.
Relief pitcher’s appearances in games that their team is losing are treated marginally by statistics. The major categories to measure a reliever’s success are traditionally W/L, K, ERA SV% and the Games Held% and Inherited Runners Scored.
Now, relief pitchers do not take as many decisions as starters for obvious reasons. There is also a trend of current relievers not taking as many decisions as relievers in the 1960-1980s. This is a result of the use of a higher quantity of relief pitchers. I cannot say that all relief pitchers, on average, have more or less appearances but they do average less innings pitched. The below graphic shows that while, games and GF have remained as a very comparable ratio across the ages usually between 75-85%, IP and W+L have been diminishing in the last dozen years.



