Michael Lorenzen
While not a top-of-the-rotation arm like Snell and Montgomery, Michael Lorenzen would still be a helpful piece in the middle of the rotation for the Red Sox. Relying on the likes of Whitlock, Houck, and Criswell in the rotation is a gamble, and bringing in even a mid-rotation arm like Lorenzen would be a good addition.
Lorenzen certainly had his struggles in 2023. After a promising first half of the season with the Detroit Tigers, he was dealt to the Philadelphia Phillies at the trade deadline. After throwing a no-hitter in his first start with the team, he struggled as he ended the season with a 5.51 ERA and 1.46 WHIP while also being demoted to the bullpen.
While there are clearly some road bumps with Lorenzen, he had things pretty well put together with the Tigers in the first half of of the season. Lorenzen is also a swingman so he could be an addition for the bullpen as well. But starting pitching is Boston's biggest need, so if the Red Sox are going to sign him, it should be as a starter.