The Shrinking Starting Pitcher Workload: Prospect Edition
Throughout baseball history, starters have thrown fewer pitches and innings than the generation of pitchers who preceded them. The trend dates to at least the early 20th century and has continued almost unabated ever since. Individual throwbacks will occasionally buck league trends — remember when James Shields tossed 11 complete games in 2011? — but history steadily marches on.
While the trend is clear, the curve isn’t linear. Throughout the game’s history, there have been a few accelerating events that have reduced workloads usage much faster than normal. The addition of the designated hitter and new definition of the save rule sent innings per start tumbling in the early 70s, for example.
It’s too early to tell definitively, but we may be on the precipice of another acceleration. We’re only two months into the major league season, and the pandemic and its related fallout are relevant and difficult variables to account for. But while major league starters are approximating the workloads they carried two years ago, minor league starters are not. On any given day in the minor leagues, someone might throw 100 pitches — but probably only one or two pitchers, and they almost certainly don’t reach 110. Remember when 100 pitches was a sort of threshold point for starters? This season, 85 is the new 100.
I went back and looked at every minor league game from May 19 to 24 (these days weren’t cherry picked; it, uh, took me a while to finish this article). In those five days, only four starters — all of whom were Triple-A vets — reached the 100 pitch mark. In that time, there were 12 entire organizations that didn’t have a single pitcher reach even 90 pitches. For the Astros, an organization that won’t let minor leaguers crest 30 pitches in an inning, the high-water mark was 79. For the Phillies, it was 67. In fact, Philadelphia has only had a minor leaguer top 80 pitches once all season.
The pandemic is to blame for some of what we’re seeing. At best, minor league hurlers had a jittery 2020, with intermittent bullpen work and perhaps a bit of summer ball at the alt site, but otherwise nothing between spring training and instructs. After such a weird season, teams are being understandably cautious with their personnel as they ramp back up. Read the rest of this entry »