The Boston Red Sox and Milwaukee Brewers pulled off a six-player trade this morning, with left-hander Kyle Harrison once again on the move – this time heading to Milwaukee. The deal sends Harrison, pitching prospect Shane Drohan, and infielder David Hamilton to the Brewers in exchange for third baseman Caleb Durbin, infielders Anthony Siegler and Andruw Monasterio, and a competitive balance draft pick.

For Harrison, it’s another chapter in what’s become a whirlwind journey since he was dealt by the San Francisco Giants last June. That trade, which sent Rafael Devers to the Bay Area, was a blockbuster – and now, with Harrison on the move again, the ripple effects of that deal are still being felt.

Breaking Down the Trade

Let’s start with the Brewers’ side. Milwaukee acquires a young lefty in Harrison who, despite limited innings in Boston, still carries the pedigree of a former top prospect.

Injuries and inconsistency limited him to just 12 innings in 2025, but there’s still upside here if the Brewers can tap into it. Alongside Harrison, they add Shane Drohan, a pitching prospect with some intrigue, and David Hamilton, a versatile infielder with big-league experience.

Boston, meanwhile, gets a potential impact player in Caleb Durbin. The 2025 National League Rookie of the Year candidate brings high-contact skills, defensive versatility, and a spark that the Red Sox infield has been missing. Siegler and Monasterio provide additional infield depth, and the competitive balance pick gives Boston more flexibility in the upcoming draft.

Revisiting the Devers Deal

This trade also puts a spotlight back on the original Rafael Devers trade – and there’s no way around it: the Giants have come out ahead so far. Devers delivered a 4.1 WAR season in 2025, anchoring San Francisco’s lineup and giving the team the kind of middle-of-the-order bat they’ve desperately needed. Meanwhile, Harrison gave the Red Sox just 12 innings and a 0.3 WAR in his lone season with the club.

Of the other pieces Boston received in that deal, Jordan Hicks is now with the White Sox, and James Tibbs III is in the Dodgers’ system, showing promise in the minors. Jose Bello is the only one still with the Red Sox organization. It’s not hard to see why San Francisco’s front office, led by Buster Posey, is feeling good about how things have played out.

Posey’s move to acquire Devers addressed a glaring need for the Giants – middle-of-the-order power – and he did it without giving up any player who’s made a major impact for Boston. That’s the kind of trade that can define a tenure, and right now, it’s looking like a masterstroke.

Red Sox in Transition

For Boston, this latest trade is part of a broader effort to retool after a turbulent stretch. They’ve been scrambling to fill the void left by Devers ever since his departure. They brought in Willson Contreras from the Cardinals to bolster first base, but also lost Alex Bregman in free agency to the Cubs – a move that reportedly played a role in Devers’ initial frustration with the organization.

Now, with Durbin and a few new pieces in the fold, the Red Sox are hoping to stabilize things. There’s potential here, but it’s clear they’re still trying to find the right combination to get back on track.

The Bottom Line

The Giants are sitting pretty with Devers in the heart of their lineup, while the Red Sox are still picking up the pieces from a trade that hasn’t panned out the way they hoped. That’s not to say Boston can’t flip the narrative – Durbin could become a key contributor, and Harrison still has the tools to develop into a solid big-league arm for Milwaukee.

But as of now, the scoreboard reads pretty clearly: San Francisco won the Devers trade. And unless something changes drastically, that deal may go down as the defining move of Buster Posey’s tenure in the front office.