Twins Video
Regression impacts even the greatest players in baseball history. Age is an obvious and essentially universal factor in projecting changes in player performance over time, but other factors, like injuries, can have an impact, too. Last year, the Twins saw Carlos Correa have arguably his worst big-league season because he battled plantar fasciitis for most of the season. Minnesota hopes Correa is back to full strength in 2024, but who are some players that the regression bug might bite?
4. Max Kepler, OF
Kepler struggled out of the gate in 2023, hitting .207/.279/.409 with five doubles and 12 home runs in the first half. Some fans called for the Twins to cut ties with Kepler, because it seemed like the team had other, better options than their long-time right fielder. In the second half, though, Kepler played at a level he had rarely attained previously. He hit .306/.377/.549, with 17 doubles, two triples, and 12 home runs in 66 games after the All-Star break. His offense helped carry the Twins to a division title, but his performance was clearly an outlier from the rest of his nine-year track record.
Baseball Reference projects Kepler to post a .746 OPS in 2024, while FanGraphs has him pegged for a .779. In his career, Kepler has only posted OPS totals higher than those projections in 2019 and 2023. Minnesota is also looking to trade veteran players to create salary space to reinforce the starting pitching. Kepler’s value might be at an all-time high, so his regression might be another team’s problem.
3. Ryan Jeffers, C
Jeffers surprised many during his rookie year, by posting a 119 OPS+ in the shortened 2020 season. He failed to reproduce those numbers in 2021 and 2022, with an 84 OPS+, forcing the Twins to add catching depth in the person of Christian Vazquez last winter. Jeffers responded with his best professional season, hitting .276/.369/.490 with a 134 OPS+ and 31 extra-base hits in 96 games. He led all catchers (minimum 250 at-bats) in OPS+, and finished seventh in WAR at the position. It was a breakout season, which has made the Twins more comfortable shopping Vázquez and other veterans this winter.
Baseball Reference projects Jeffers to hit .246/.326/.438 with 17 doubles and 15 home runs next season. FanGraphs forecasts a .743 OPS, with a 105 wRC+ and a 1.7 WAR. Both projection systems have him with a higher OPS than his career average, but a lower one than what he posted last season. His 2.7 WAR last season was three times more than he has contributed in any other season. Jeffers is locked into the team’s catcher role for the foreseeable future, and it would be nice for him to continue building off last year’s performance.
2. Brock Stewart, RP
Stewart dominated during his first season in a Twins uniform, but an elbow injury limited him to fewer than 28 innings pitched. He provided Minnesota with 0.9 fWAR and 1.6 rWAR, which is remarkable considering the lack of sheer innings. His 0.65 ERA was immaculate, but his FIP was 2.21, so there might have been some luck associated with his overall numbers. Stewart posted a 35.8 K%, over 14 points higher than his previous career average. For his career, he has never pitched more than 34 1/3 innings at the big-league level, so the Twins hope he can top that mark next season in a setup role.
Baseball Reference projects Stewart to post a 3.46 ERA with a 1.28 WHIP and a 41-to-14 strikeout-to-walk ratio over 39 innings in 2024. Those totals are certainly adequate, but it’s a steep drop from the 12.7 strikeouts per nine frames he posted in 2023. FanGraphs estimates that Stewart will post a 3.48 ERA with a 30.1 K% in 63 innings. It’s hard to imagine that he would get to 63 innings with his lengthy injury history, but relievers can be inconsistent from one season to the next. Overall, Stewart’s numbers must regress next season, because he was so good in 2023.
1. Willi Castro, UTIL
Castro surprised many with his performance last season, hitting .257/.339/.411 with 32 extra-base hits and 33 steals. During his four seasons in Detroit, Castro averaged a .673 OPS (87 OPS+), so his 106 OPS+ last year didn’t match his career totals. He gave the Twins tremendous value, especially since the team was comfortable using him at multiple defensive positions. Castro was one of the team’s most valuable offensive players, which is crazy to think about since he wasn’t guaranteed to make the team coming out of spring training.
Baseball Reference projects Castro’s OPS to drop 40 points next season, which is 16 points higher than his career average. FanGraphs believes he will have a .705 OPS, with a 1.0 WAR, a 1.5-win drop from 2023. There is a reason why Castro was available on waivers last winter, and other teams didn’t claim him. The 2023 season might have been his peak, which only points to his performance declining in 2024.
Do you agree with the above rankings? Would you add other players to the list? Leave a COMMENT and start the discussion.







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