As highlighted in our 2025 Opening Day post, PECOTA, the projection engine at Baseball Prospectus, sees the Detroit Tigers with a less than one-in-five chance of returning to the playoffs in 2025, the longest odds it projected for any team that also appeared in the 2024 postseason. That feels like a personal attack.
But how much weight should Tigers fans accord this relatively dim outlook? In a field of competing inexact-science offerings, PECOTA has earned a reputation as one of the least-inexact baseball projectors. It still makes mistakes, though. Would it be relevant to those Tigers’ fans’ answers to the immediately preceding question that PECOTA recently produced another extreme, negative projection about the team that turned out to be very wrong? If your answer to the now-immediately preceding question is “yes,” then read on.
PECOTA sees Detroit’s likely starting backstop completely forgetting how to catch in 2024:
Rogers was a top-ten defensive catcher in 2023. (The BP website has different defensive numbers for Rogers and other catchers than those appearing in the book. I’ve inquired and it sounds like their stats team made some post-publication tweaks to their average benchmarks that may account for the variance.) Most of this projected thirteen-point drop comes in the form of a projected swing from being a top-ten framer to a bottom-thirty guy at that skill. Ironically, Rogers’ BP annual blurb mentions his “unseat[ing of] Eric Haase for the starting catching job” even as PECOTA projects him to frame as poorly as Haase did in 2023. (To fully square this circle, Haase’s 2024 framing projection is -3.2 runs.)
This is not the first time PECOTA has thought lowly of Rogers’ defense. In the 2023 BP annual, for example, it forecast him for -7 DRP, with a -6.5 on the framing component, both huge misses. Undaunted, the computer has doubled down for 2024.
Everyone in baseball will tell you that defensive metrics are especially difficult to define and measure and therefore probably should be regarded a little more cautiously than other performance metrics. That’s sensible and unobjectionable. What creates undue difficulty, in my opinion, is what seem like wild year-to-year oscillations in players’ defensive numbers. Of course players aren’t going to be exactly the same person every season, and many factors– injury, age, chance, drugs, etc.– can cause production value to vary outside a “normal” career development curve. Breakouts can happen quickly. Careers can end quickly. When we’re told a player’s defensive performance has yo-yoed erratically from season to season without ready explanation, though, it makes it very difficult to ascribe any meaning to defensive metrics, even on their own terms and within their own contexts. Maybe Rogers really is a definitively unremarkable catcher who just had his Brady Anderson framing season. Probably not, though.
If that big whiff is enough of a reason for you to throw out the 2025 PECOTA projections in their entirety, I won’t stop you. So far as the actual team is concerned, though, there’s not going to be anything good left to project if they don’t start winning. The Tigers, still hunting their first win, are back in action tonight in Seattle after a Sunday of rest following a tough Dodgers’ sweep.
ALDLAND 
Pingback: Maximum Tork: How Spencer Torkelson is cranking up his hot start in 2025 | ALDLAND
Pingback: More Likely Than Not: The 2025 Detroit Tigers are winning, and winning matters | ALDLAND
Pingback: On baseball robots, probabilities, and getting fooled again | ALDLAND