Red Sox Linked to Free Agent First Baseman After Casas Concerns

With first base emerging as a growing concern, the Red Sox may have their eyes on a power-hitting solution that could redefine their lineup.

Red Sox Eye Pete Alonso as First Base Becomes Offseason Focal Point

The Boston Red Sox have made their intentions clear this offseason: they want power, they want consistency, and they want it now. First base, once expected to be locked down by Triston Casas, is suddenly the most pressing question mark on the roster. And with Pete Alonso now officially on the free-agent market, Boston is positioning itself as a serious player for one of the most dangerous bats available.

Let’s start with the obvious: Alonso brings thunder. The 30-year-old slugger just wrapped a 2025 campaign that looked like it was pulled straight from a video game-38 home runs, 126 RBIs, and a .871 OPS across a full 162-game slate. That’s the kind of production that doesn’t just fill a hole in the lineup-it reshapes it entirely.

Compare that to the Red Sox’s current situation at first base. Casas, once seen as a cornerstone, couldn’t stay on the field.

A knee injury ended his season in May after just 29 games, and in that short stint, he managed only three home runs and a .580 OPS. The talent is there, but availability and consistency are not.

And in a division as competitive as the AL East, Boston can’t afford to wait around and hope things turn.

That’s where Alonso fits in perfectly. He’s not just a big bat-he’s a proven, durable, middle-of-the-order force.

And according to league insiders, Boston is one of the frontrunners to land him. Reports from Dec. 1 suggest the Red Sox are prioritizing a major offensive upgrade, and Alonso is at the top of the list.

The front office isn’t necessarily giving up on Casas, but the writing is on the wall: they want an everyday impact player at first base, and Alonso checks every box.

If Boston does land Alonso, it could lead to a shift in Casas’s role. A move to designated hitter is one possibility.

A trade isn’t off the table either. But for now, the focus is on adding a bat that can deliver from Day 1.

Alonso’s track record speaks for itself.

And he’s not the only name on Boston’s radar. Kyle Schwarber is also in the mix, another lefty slugger with serious pop.

The Red Sox are clearly in on power this winter, especially with Alex Bregman’s return looking increasingly unlikely. According to MLB Network, Boston is aggressively pursuing middle-of-the-order bats, and Alonso and Schwarber are drawing the most attention.

The competition, however, is heating up. The Orioles have reportedly shown interest in both Alonso and Schwarber, though their pursuit of Alonso appears to have cooled.

Still, their recent signing of closer Ryan Helsley to a two-year, $28 million deal shows they’re not sitting still this offseason. Both Alonso and Schwarber are expected to command salaries in the $30 million per year range, so this won’t be a quiet bidding war.

Boston’s offseason is already off to a strong start. They’ve added right-hander Sonny Gray to bolster the rotation, and now the focus has shifted to the heart of the lineup. First base is the priority, and Pete Alonso might just be the answer they’ve been looking for.

If the Red Sox can close the deal, it would be a major swing-not just in terms of roster construction, but in signaling to the rest of the league that Boston is serious about contending in 2026.