Showing posts with label plus-minus. Show all posts
Showing posts with label plus-minus. Show all posts

Wednesday, May 06, 2009

Know When to Move 'Em

This past Saturday, I got a chance to watch my Braves maul the Reds to the tune of a 10-2 loss. I managed to get good seats to the ballgame, right down the left field line. As I sat there baking in the afternoon sun, I got a close look at the Cincinnati ballclub. Unfortunately, getting a close look at Reds baseball is a mixed blessing.
Case in point: third baseman Edwin Encarnacion. Encarnacion is a 26-year-old, good-hitting fellow whose biggest problem is a tendency to throw the ball not quite close enough to the big fellow with a glove standing at first base. Currently in his fifth major league season, Encarnacion has none the less committed 77 errors in his big league career. He’s the only player in the league who gets his defense recorded on a spray chart.
His erratic arm is a serious problem, but I didn’t realize how serious it was until I got a new statistical take on it. John Dewan, with the help of Baseball Info Solutions, has developed a new method of rating defense: the plus-minus ratings. It’s much more accurate than simple fielding percentage, but is still simple enough for even a casual fan to understand. A player’s plus-minus rating is the number of plays the player makes that an average player at that position would not normally make (a positive number is good, zero is average, negative numbers are bad). The newest set of plus-minus ratings were published in The Fielding Bible: Volume II, the sequel to Dewan’s groundbreaking 2006 book The Fielding Bible. Simply put, Encarnacion doesn’t look good.
According to Dewan’s system, Encarnacion was the worst full-time defensive third baseman in baseball in 2008, with a plus-minus rating of -21. The next-worst was Melvin Mora, at -13. Encarnacion is also the worst in the MLB over the last three seasons; his rating of -51 is worse than Garrett Atkins (-42) and ex-third baseman Miguel Cabrera (-40). Dewan’s listings only go back to 2003, and it should be said that Encarnacion isn’t considered the worst defensive third baseman over that period (2003-2008); he’s the second-worst (Ty Wigginton’s -75 is far worse than Encarnacion’s -46).