Mike Piazza is a great defensive catcher, he just can't throw guys out
I'm growing very tired of unenlightened baseball fans citing Mike Piazza as a poor defensive catcher. Almost all of Piazza's defensive criticism stems from his mediocre (at-best) ability to throw out baserunners, but this stat has been proven to be somewhat iconsequential, especially in light of other aspects of the position.
1. CERA (Catcher's ERA)
Piazza's CERA is considered low. CERA is not a useless stat, but it can be biased based on the pitching staffs you have caught. Just to make sure there are no misunderstandings, here is Piazza's CERA versus his team's ERA:
2003: Piazza 3.97, Mets 4.48
2002: Piazza 3.84, Mets 3.89
2001: Piazza 4.05, Mets 4.07
2000: Piazza 3.87, Mets 4.16
Pretty interesting stuff eh? The Mets are a better team with Piazza catching, every year. His CERA is always lower than the team ERA, most noticeably in 2000, when the Mets went to the World Series.
In addition, Piazza's CERA is significantly lower than Vance Wilson's CERA, who is an expert defensive catcher. Piazza's CERA over the last bunch of years is below 4, Wilson's is 4.40, catching the same pitching staff.
The half run Piazza saves every game is worth MUCH more than the occasional stolen base he may give up during the course of a game.
2. Fielding Percentage
Vance Wilson, considered one of the best defensive catchers in the game, has a career FPCT of .988. Mike Piazza's career FPCT is .989. Piazza lets 1 past ball by for every 132 innings he catches. Vance lets one by in 1 out of every 134 innings pitched.
Considering Vance is considered one of the best defensive catchers in the game, you would have to admit that Piazza's fielding abilities are as good or better than Vance's, especially when you consider he's 35 years old now.
3. Range
Well, Piazza is a slow guy right? He must have no range (even though it isn't that important for a catcher). Well, here you go: Piazza's career range factor is 7.78. Vance has a career RF of 7.39. Looks like Piazza is better than you would think at jumping out on bunts and catching those foul popups along the walls.
4. Knowledge
Piazza has spent 13 seasons catching in the National League. He's also a hitter that hits for power and average. You would be hard-pressed to find a catcher with more experience and/or knowledge than Piazza.
5. Arm
Piazza's arm is his one weakness, but how much of a weakness is it? Piazza gives up one stolen base every 10 innings (not even one per game). The best throwers in all of baseball give up one stolen base per two games. If Vance Wilson and Mike Piazza both caught 1000 innings (a typical season for a catcher), Piazza would give up 100 stolen bases, Vance would give up 50. Over the course of a 140 game season, that is 1 extra stolen base per 3 games. So twice a week, Piazza gives up an extra base over someone with a known cannon like Vance Wilson. There are plenty of big named catchers who are as bad (or worse) than Piazza at throwing. Just last season, 11 starting catchers finished with a lower CS PCT than Piazza did, including names like Varitek, Posada, Lieberthal, and Kendall, among others.
Conclusion
I think the conclusion is pretty evident. Mike Piazza struggles with would-be base stealers. I'm sure it doesn't help that several of the pitchers on his staff are horrible at holding runners on, but let's call a spade a spade. His arm is below average. Having said that, his ability to catch, as the position is aptly named, far supercedes his lacking in the throwing department. When you take into consideration his offense at the position ... the point becomes somewhat moot. In fact, the only reason people should want to stop Piazza from catching is to get him more at-bats during the course of a season. His defense has nothing to do with it.
Editor's Note: Now that Piazza is 35-years-old and he will be spending a good portion of time practicing at first base, one would expect his defensive numbers and skills to atrophy. This article was referring to his first 12 years in the bigs, as a catcher (pre-2004)