
On May 23, Caleb Durbin was the worst hitter in Major League Baseball. He had a wRC+ of 34, which was on pace to be the lowest mark for a qualified hitter since Matt Wallbeck in the strike-shortened 1994 season. In a full season, the last hitter with a lower wRC+ was Billy Hunter on the 1953 Saint Louis Browns.
All this to say, Durbin struggled. And on May 23, Boston Red Sox fans looked over to the Milwaukee Brewers roster and saw Kyle Harrison, the main piece in the trade to acquire Durbin, throwing to a 1.77 ERA in 45.2 innings.
Also swapped in that trade were David Hamilton and Andruw Monasterio, who have both struggled offensively in 2026. Shane Drohan was another addition to the Brewers, who has become an excellent swingman. Anthony Seigler was the final piece in this deal, who was recently promoted to the Red Sox and already has 0.8 bWAR in 15 games.
But in the month of June, Durbin has looked like a completely different player. Before June 10, Durbin had just one home run. Ever since, Durbin has seven home runs and is one of the best hitters in the league. Combine this with 85th-percentile OAA and +10 DRS at third base, and Durbin is a changed player.
Let’s take a walk through Durbin’s time in a Red Sox uniform.
While Durbin’s numbers slowly climbed from May 23 to June 10, this June 10 marker is primarily in place to track his major power surge. His two-homer game on June 10 marked the beginning of a 22-game stretch where Durbin hit seven of his eight home runs this season. He hit just 11 homers in his entire 136-game rookie season.
From June 10 through July 5, Durbin has been simply remarkable. In 22 games, he ranks 22nd in MLB with a 162 wRC+. When factoring in his defensive numbers, Durbin’s 1.1 fWAR over that span places him tied for 12th in the league.
When looking at this sudden power surge year-over-year, it’s also worth noting park factor, a metric used to determine which ballparks are the most hitter-friendly.
League average is 100, with a park like Coors Field in Denver holding a 113. Fenway has the seventh-highest offensive output of these parks at 102, while Milwaukee is the fourth-worst place for hitters at 97.
However, Fenway is largely ranked this high due to its rate of doubles, the second-highest in the league. In terms of home runs, Milwaukee is more hitter-friendly, allowing Durbin to develop more extra-base hits at home on average, but struggle more with homers.
Nonetheless, the bright lights and fans in Boston are more challenging for many when compared with a smaller market like Milwaukee. While Durbin has improved at Fenway with three of those seven home runs, the real change in his offensive game has been on the road.
Durbin’s Fenway numbers are still below average, but in his last nine games on the road, Durbin has a 1.336 OPS and a 269 wRC+. This includes four home runs and just three strikeouts in 35 PAs.
Caleb Durbin this season:
— Just Baseball (@JustBB_Media) July 4, 2026
First 59 games: 1 HR
Last 20 games: 7 HR
The 26-year-old is finally bringing some quality production to the Red Sox’s lineup! pic.twitter.com/v3pKDMlfs0
Durbin’s turnaround is unique, in that it was so hard to predict. Durbin’s expected stats during these struggles did him no favors.
While his wRC+ before June 10 made him a bottom-five hitter in the league, while his xwOBA made him the 11th-worst hitter in the league. It’s an improvement, but not one that’s likely to inspire fans with hope for change.
The numbers backing up Durbin’s game to some degree were his batted-ball metrics. While still sitting around the 20th percentile of players, Durbin did have a hard-hit percentage at 29.9% and a line-drive rate at 17.5%. This means he was making good contact at times and seeing a few more loud outs than the average ballplayer.
In many ways, Durbin merely needed time to adjust. You can call it the Boston media or the change of scenery, but it is the second year in a row where Durbin has struggled early on.
On May 23, 2025, Durbin had an OPS of just .524 with the Brewers. This isn’t some new phenomenon for the young third baseman, but perhaps a pattern of early-season slumps.
When Durbin struggled so mightily, it was easy for any baseball fan to ask, “Why is he still in the starting lineup?”
Well, one factor is the lack of backup options in the lineup. Trevor Story’s injury forced Marcelo Mayer to play shortstop, and with second base duties split between Monasterio, Isiah Kiner-Falefa and Nick Sogard, it was hard to find consistent time for anyone but Durbin at third.
The other factor that made it tricky to keep Durbin out of the lineup was his defense. Durbin has +10 defensive runs saved this season, which is the best number among AL third basemen. He trails only two-time Platinum Glover Matt Chapman among all third basemen.
These metrics become more of an anomaly when you consider Durbin’s arm strength, which ranks in just the 28th percentile per Statcast. Despite his strong range, Durbin does not release the ball to first with much velocity. Rather, he is consistent when throwing. Among qualified fielders, only Durbin, Nolan Arenado, and Manny Machado have committed one or fewer throwing errors in 2026.
While the presence of home fans hasn’t caused a major change in Durbin’s numbers, it’s worth considering the effects that the local market can have. Even on the road, the pressure of a fanbase can cause changes to a player’s mental game.
When Durbin was slumping through the first week of the season, he told WEEI’s Rob Bradford, “‘That’s Boston, right? You want fans that are poured into it. When you’re not going good, when it’s bad, you’re beating yourself up more than anything. You definitely don’t take it personally. It’s honestly a good thing because you want the fans to be on you, and that’s what makes Boston special.”
Caleb Durbin: 'That’s Boston, right? You want fans that are poured into it. When you’re not going good, when it’s bad, you’re beating yourself up more than anything. You definitely don’t take it personally. It’s honestly a good thing because you want the fans to be on you, and…
— Rob Bradford (@bradfo) April 3, 2026
There are certainly players who struggle to acclimate to a market as large as Boston and succeed more among smaller fan bases. Daniel Bard is a classic example of this, where he developed the yips in Boston and opted to play for Colorado when he made a comeback seven years later.
That being said, it’s hard to paint Durbin as one of these cases. Sure, he struggled more in Boston than he ever had with Milwaukee. But when he was the worst hitter in the league, his numbers were better in Fenway. During this recent hot stretch, his numbers on the road exceed those at home.
Durbin has admitted that Boston fans are harder on their players, but that hasn’t been reflected in his numbers throughout the first few months in Boston and Milwaukee, respectively. Red Sox fans learned in June that Durbin needed some time to adjust. Since then, he’s been perhaps the most important piece in the Red Sox lineup.
All stats were taken prior to play on July 6.
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