This year, I've sat in amazement as people complain about Joe Mauer. And, I've yet to see why. Is he hitting .365 with 28 home runs this year? No. He'll end up around .325, with 10 home runs. Prior to tonight's marathon game with Tampa Bay, our boy Joe is hitting .318/.387/.472. He's second in MLB with 34 doubles, and he's striking out less than he did last year. His batting average on balls in play is .339, And while he doesn't possess Carl Crawford speed, he can steal a base if he needs to. Joe Mauer can do it all. And if he didn't have to deal with the rigors of catching, he'd hit for power as well.
The only problem with that, is Joe Mauer is an elite defensive catcher. The Gold Standard, of course is Yadier Molina. Yadi has thrown out almost half of would be base stealers, and holds his pitchers to an ERA of 2.99, though it should be stated his pitchers are Chris Carpenter, Adam Wainwright, and rookie sensation, Yadier Molina. Compared to Joe's 4.30, with a rather pedestrian starting staff. Though, Yadi has had more opportunities to pick off thieves than Joe. Molina has caught 43% of thieves to Joe's 27%. Molina is clearly better policing the bathpaths than Joe is.
But, when you look at F20% (percentage of balls fielded that resulted in an out) Mauer is at a spotless 100%. Molina is at 91% (full disclosure: Mauer has had 20 chances, Molina has had 34).
BF20% (percentage of bunts fielded that have resulted in an out) tells a similar story. Mauer is once again perfect, with Molina at 87%. Once again, full disclosure Mauer has had 6 chances this season, to Molina's 15.
Throughout their careers, however it still stands that Mauer is the superior fielder to Molina. Molina's career F20% and BF20% is 88% and 80% respectively, to Mauer's 97% and 86%.
On blocking balls, they are mirror images of each other, with Mauer and Molina both having 4 passed balls and 21 wild pitches.
When you look at the limited amout of catching metrics out there, Mauer and Molina are rather close when it comes to just about everything apart from preventing larceny.
That is why Joe isn't getting moved from catcher anytime soon.