I seriously doubt he made a 1.50 difference, either, even with the one or two guys who had those disparities. Certainly other factors are involved, but when just about every pitcher over the 5 years Leon was here did better with him, especially the ones with significant sample sizes with more than just him, I have to think he made some sort of positive impact, or else he would not have played as much as he did.
He hit way worse than other catchers on those teams.
His framing and bad-pitch-blocking skills were not greater or much greater than the others.
His throwing out base stealers (what are those, these days?) were also not that much better, if at all better.
Am I the only one that thinks the massive amount of pitchers do better or much better with him might have something to do with things not captured by WAR?
I can't believe it's all just a statistical random occurrence with just about every single pitcher? It would be like having 20 Kershaw's all on one team and all pitching 1.50 over their seasonal ERA in the playoffs, and then the same thing with Vaz vs other catchers (bad way) and VTek with other catchers (good way).
I'm fine with people not believing catchers make big differences, and personally, I don't attribute all of the variance to just Leon, but I think the overwhelming amount of sample size, big, medium and small show pitchers do better or worse with certain catchers means something substantial.