The Red Sox addressed their infield depth Monday morning, completing a six-player trade with the Brewers that brings a former Rookie of the Year finalist to Boston.
Boston acquired infielder Caleb Durbin from Milwaukee in a deal that sends pitchers Kyle Harrison and Shane Drohan, along with infielder David Hamilton, to the Brewers, sources told MassLive. The Red Sox also received Andruw Monasterio, Anthony Seigler, and a Competitive Balance B draft pick. The trade was finalized Monday as Boston officially opened spring training at its Fenway South facility.
Durbin, who turned 25 earlier this month, had recently emerged as a possible infield target for the Red Sox. Boston had been connected to several trade options in recent weeks—including Houston’s Isaac Paredes and Chicago’s Nico Hoerner and Matt Shaw—after Alex Bregman signed a five-year contract with the Cubs. A former Yankees prospect dealt to Milwaukee last offseason, Durbin spent most of his 2025 rookie campaign at third base, logging more than 1,060 innings, but also saw time at second base and shortstop. His versatility gives manager Alex Cora options as camp begins, especially with Willson Contreras set at first base and Trevor Story entrenched at shortstop. Durbin joins Marcelo Mayer and free-agent addition Isiah Kiner-Falefa as candidates for second and third base.
Despite standing just 5-foot-7, Durbin brings steady defense and solid contact skills. Over 136 games last season, he batted .256 with 11 home runs, 25 doubles, 53 RBIs, and a .721 OPS, while stealing 18 bases in 24 attempts. He struck out at a low rate (9.9 percent), led the National League by being hit by 24 pitches, and ranked near the top of the league in both strikeout rate and whiff percentage. However, Statcast data showed his hard-hit rates were inconsistent. Defensively, he posted five defensive runs saved at third base.
Boston also added Monasterio, a 28-year-old utility player who recorded a .755 OPS in 68 games for Milwaukee last season while appearing at five different positions, primarily shortstop. Seigler, meanwhile, made his major league debut in 2025 and appeared in 25 games at third base. Both players are expected to add depth to an already crowded group of infield options. Even after dealing Hamilton, the Red Sox still have Nick Sogard, Nate Eaton, Romy Gonzalez, and Tsung-Che Cheng in the mix. Like Durbin, both Monasterio and Seigler have remaining minor league options, allowing them to move between Boston and Triple-A as needed.
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To obtain the three infielders, the Red Sox dealt a trio of spare parts from their 40-man roster in a package headlined by Harrison, who was the key piece acquired as part of the Rafael Devers blockbuster trade in June. The 24-year-old Harrison departs having logged just 23 ⅔ innings in a Red Sox uniform. He was expected to serve as rotation depth entering the season. In Harrison and Drohan — a 27-year-old former fifth-round pick who burst back onto the prospect scene with a strong 2025 season — the Red Sox dealt two pitchers from a deep pool of rotation options. Even after dealing Hunter Dobbins, Richard Fitts and Davis Sandlin – and now Harrison and Drohan — while also losing Lucas Giolito and Cooper Criswell, the Red Sox remain 10 deep when it comes to the starting group. Behind Garrett Crochet, Ranger Suárez, Sonny Gray, Brayan Bello and Johan Oviedo are veterans Kutter Crawford and Patrick Sandoval as well as rookie lefties Connelly Early and Payton Tolle, who are both certain not to be dealt now after popping up in trade rumors all winter.
The speedy Hamilton, who appeared in 204 games with the Red Sox over the last three years, returns to the organization that drafted him in the eighth round back in 2019. Milwaukee sent Hamilton to the Red Sox via trade in December 2021 as part of the Hunter Renfroe-for-Jackie Bradley Jr. swap.
Boston also received a draft pick that currently projects to be No. 67 in July’s draft. The club previously forfeited its second and fifth-highest picks when it signed Suárez, who had declined a qualifying offer from the Phillies. The Red Sox will first pick at 20th overall, then again with the pick they acquired from Milwaukee after forfeiting their second-round selection for Suárez.
All six players involved are on the 40-man roster, so Durbin, Monasterio and Seigler will replace Harrison, Hamilton and Drohan for Boston. The Red Sox will have a full 40-man group when camp opens but still need to add Kiner-Falefa to the mix when his deal becomes official. Boston can shift injured righty Tanner Houck to the 60-day injured list to create a spot.
