He was the best hitting catcher of all time and underrated behind the plate controlling games
Mike Piazza's not going into the Hall of Fame this summer for a bunch of reasons, and his defense is just one of them. But does he deserve the bad rap for his glove work?
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The most important part of a catcher’s job is handling his pitchers and in this area Piazza was superb. Here is one of the most telling statistics. In his career behind the plate, pitchers had a 3.80 ERA when Piazza was catching. If you look at all the other catchers who caught the same pitchers in the same year that Piazza did, they allowed a 4.34 ERA. That’s a major difference, much more important than a few extra bases stolen. (In fact, Piazza’s catcher ERA of 3.81 includes the run value of any extra stolen bases he allowed.)
Craig Wright wrote an excellent article in The Hardball Times Baseball Annual 2009 called "Piazza, Hall of Fame Catcher". He did a detailed sabermetric study that showed that hitters had a .723 OPS with Piazza behind the plate and a .748 OPS with other catchers. This 25-point differential is highly significant. In further studies that we did in
The Fielding Bible—Volume II, we found that Piazza saved at least 20 to 70 runs more than an average catcher defensively, depending on the technique that we used.
I highly recommend checking out the Piazza article by Craig Wright ... My conclusion is the same as his from that article:
"Mike Piazza was not a defensive liability who made up for it with his bat. The greatest offensive catcher in the history of Major League Baseball was a good defensive catcher as well."