Do Early Decline Players Share Any Traits?
Last year, two of the most notable free agent signings of the winter were inexplicably terrible. Carl Crawford went from being an All-Star to a replacement level scrub, while Adam Dunn went from productive slugger to the worst hitter in baseball – well, almost – Orlando Cabrera just barely edged him out. Obviously, Crawford and Dunn are about as different as any two players in baseball, as Crawford is a speed-based gap hitter who produces a lot of value with his glove, while Dunn is a walks-and-homers guy who rightfully spent the year as a DH.
Neither player had shown any real sign that their skills were regressing, and while Dunn’s struggles could have just been a guy with old-player-skills getting old early, Crawford was 29 and in his athletic prime. It’s possible that either or both could bounce back and resume their previous levels of production, but their struggles got me wondering about whether there are certain player types that are more prone to this kind of out-of-nowhere collapse of production.
In order to look at this a little closer, I polled our FanGraphs staff looking for guys who were quality players for multiple years and then just turned into a pumpkin overnight. Because I was looking for guys whose decline wasn’t easily explainable, we’re omitting players who had significant injuries or were too far on the wrong side of 30 – this isn’t so much a question about aging curves or the effects of a body breaking down as it is a question of whether players who derive value from a certain type of performance are more likely to just see that value dry up overnight. We’re also only looking at position players, because pitchers are their own complicated story with a totally different mix of problems.
Here’s the list of guys that we came up with last night – it’s not a comprehensive list, and I’m hopeful you guys will add more names to the pile, but it’s a decent start.