Caleb Durbin's Compatriots: Breaking Down Other Assets Red Sox Received In Kyle Harrison Trade

[Nick John]

When the Boston Red Sox completed their trade with the Milwaukee Brewers, Caleb Durbin was the centerpiece. In return for a young, controllable pitcher like Kyle Harrison, a young, intriguing arm like Shane Drohan, and a speedy infielder in David Hamilton, the Red Sox acquired someone who should make an immediate impact at second or third base in 2026. However, they acquired more than just Durbin, as both Andruw Monasterio and Anthony Seigler along with a Competitive Balance Round B pick were sent to Boston to complete the trade.

Durbin's place on this team has been discussed previously by our @Jack Lindsay, and now the remainder of the trade is going to be looked at to see how they might fit into the roster.

When the pick was first announced, the exact spot in the draft was unknown. However, that has since changed. With the Arizona Diamondbacks bringing back Zac Gallen, it locks the pick in at No. 67 overall. This pick reasonably replaces the team’s second-round selection they lost for signing Ranger Suárez. In the 2025 draft, the value for the 67th pick was $1.28 million. For comparison, the Red Sox held the 75 overall pick last year and the team took Henry Godbout. The infielder signed for the slot value of just under $1.1 million. This pick brings the Red Sox to three picks in the top 100 after previously only having selections at Nos. 20 and 96.

As for actual players, the team acquired two utility infielders in Monasterio and Seigler, one seemingly more valuable than the other.

Monasterio, who won’t turn 29 until the end of May, played parts of three seasons with Milwaukee. Appearing in a total of 219 games, the infielder hit .250/.321/.351 with 28 doubles, one triple, eight home runs, and 59 RBIs. Monasterio has hit lefties rather well for his career, slashing .255/.352/.375 with 10 doubles, four home runs, and 24 RBIs in 109 games. With Romy González likely to open the season on the injured list after it was revealed there’s a slight tear in his injured shoulder, Monasterio should have a good chance at getting the first crack at handling his duties as a utility man/lefty masher.

The original plan was to have González platoon with Marcelo Mayer. This would allow the young infielder to be protected against left-handed pitching and allow González the opportunity to continue his great hitting against southpaws. Now, it might be Monasterio who fills that role while González is out of commission. While his numbers against left-handed pitching are not as good as González’s, the utility infielder has shown himself to be capable against them. Add to it his ability to play multiple positions (appearing at every infield position at least eight times in 2025) and he seems destined for a utility role, even if his stay in Boston is only temporary.

Monasterio has taken the opportunity for reps during spring training with the group that consists of starters and those likely to crack the Opening Day roster, as he’s caught the eye of Alex Cora early on in camp. The Red Sox manager has described him as a “great athlete” and has said “you see him from afar, whatever. But then you see him here, it’s like oh shoot he can move, he’s versatile, he can hit lefties, he’s got some pop,” according to Christopher Smith of MassLive.

The final piece to come over from the Brewers, Seigler, seems to be the least impactful and will likely be in Triple-A as an emergency depth option. Drafted by the New York Yankees back in 2018, Seigler never made it to Triple-A with the Yankees and would join the Brewers organization in 2025.

The infielder did have an impressive season with Triple-A Nashville, hitting .285/.414/.478 with 16 doubles, four triples, eight home runs, and 39 RBIs. He also displayed a great understanding of the strike zone, walking 52 times compared to striking out in 59 at-bats. That led to his MLB debut in Milwaukee, but he struggled badly in his cup of coffee; in 34 games, the infielder hit .194/.292/.210 with one double, and five RBIs.

Seigler can play multiple positions, having been drafted as a catcher before being moved to second base in 2024. While with the Brewers organization, he appeared at second base, third base and catcher while in Triple-A but only at third base (excluding one inning at catcher and one inning as a pitcher) upon being called up. Even while playing winter ball. he split time at second base and third base.

During the first week of spring training, the infielder did not work with catchers but remained with the infielders. Specifically with the second group, or the non-roster invites, as he took reps at second base and third base.

With the team having someone like Nick Sogard on the 40-man already and someone like Brendan Rodgers in camp, Seigler is unlikely to crack the Opening Day roster. Likewise, due to the previously mentioned players, it would not come as a surprise if he were to be designated for assignment at some point (though the team would likely DFA Mickey Gasper or Tsung-Che Cheng first) if they needed a roster spot.

For now, Seigler serves his role within the organization: A player who, if needed, could be called up and provide defensive versatility while the team awaits a starter to return from an injury. His bat at the major-league level has not proven capable of handling the best pitchers in he world. If that changes, Seigler's outlook will as well.

Overall, the Red Sox did rather well in the trade. On top of Durbin, they were able to get another pick within the top 100 along with a serviceable infielder and a quality depth option, and all they really gave up was a starter who had no path to the rotation in Boston.

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[Malcolm White]

Trader Craig -- where once he had pitching depth, he traded it for infield depth,