I'm not really sure the methodology they use, and there may be multiple competing stats we are referencing. I was thinking of the pitching framing leader board linked from this recent Fangraphs article: http://www.fangraphs.com/blogs/pitch-framing-and-a-peek-inside-the-industry/ For that stat the leaders over the last few seasons are: 2013 1) Jonathan Lucroy, +31.1 RAA (+234 calls) 2) Chris Stewart, +22.7 RAA (+170 calls) 3) Yadier Molina, +19.8 RAA (+149 calls) 2012 1) Jose Molina, +25.9 RAA (+194 calls) 2) Jonathan Lucroy, +24.7 RAA (+186 calls) 3) Ryan Hanigan, +24.1 RAA (+181 calls) 2011 1) Jonathan Lucroy, +41.2 RAA (+310 calls) 2) Brian McCann, +31.6 RAA (+238 calls) 3) Russell Martin, +24.4 RAA (+184 calls) 2010 1) Brian McCann, +30.1 RAA (+226 calls) 2) Ivan Rodriguez, +26.0 RAA (+196 calls) 3) Jonathan Lucroy, +24.0 RAA (+181 calls) I would be interested to know how they try to isolate this stat from the identity of the pitchers involved though. For example, we all know about Gallardo's reputation for "nibbling" the edges of the strike zone. Maybe Lucroy is rated so highly because he is regularly catching a pitcher who is particularly prone for getting called strikes based on subtle pitch-framing adjustments by the catcher.