Last week I linked to a study by Vanderbilt University researchers which concluded that player fatigue leads to poor decision making on their part as the season wears on. Swinging at more pitches out of the strike zone and whatnot. The research goes further to suggest that baseball’s crackdown on stimulants exacerbated this.
… while a sleepy player might suffer from impaired performance, it’s a stretch to say that the league as a whole has worse plate discipline due to fatigue later in the season, and an even greater stretch to suggest that the amphetamine ban has produced a marked uptick in player fatigue. Those things might be true, but this study hasn’t shown them to be true.
Ben digs in to the plate discipline numbers and the data before and after the stimulant crackdown and comes away unconvinced by the study’s conclusions.
Certainly worth your time if this stuff interests you.