Cyril Morong of 'Beyond the Boxscore' created two 15 player lists, one of pitchers who improved from the 2005 to 2006, the other of players who declined. He used a statistic called RSAA which means "the amount of runs that a pitcher saved vs. what an average pitcher would have allowed. It is
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Original Story:
http://www.beyondtheboxscore.com/story/2....