Kenny Peoples-Walls And How Shortstop Fielding Develops
A little over a month ago, I wrote this piece, examining how minor league catchers cut down on their passed ball rates over time. Indeed, anyone who peruses Baseball-Reference minor league catcher pages probably notices the tendency for teenage backstops to let pitches by them at alarming rates, only to ultimately settle into a more acceptable range as they reach their mid-twenties. On at least an anecdotal level, one can observe a similar phenomenon with left-side infielders–third base and shortstop are the most error-prone positions, and these tendencies can be blown up by inexperience. The worst qualified fielding percentage by an MLB shortstop in 2013 was Jed Lowrie‘s .962, and the worst from a qualified third baseman was Pablo Sandoval’s .940, but in, say, the Low-A South Atlantic League, ten of the fourteen third basemen who got over fifty games at the spot fell below that .940 fielding mark, and twelve of the fifteen shortstops didn’t break .962. And the short-season levels are a level of magnitude worse than that.
As with catchers, then, we can assume that left-side infielders cut down on their error totals significantly as time goes on. In this piece, I’m going to examine the development of shortstops in this area.