Article: Boston Swaps Out Pitchers, Sean Newcomb DFA'd While Luis Guerrero Recalled

[Nick John]

The Boston Red Sox continue to make roster moves today, as the team designated left-handed pitcher Sean Newcomb for assignment following game one of their doubleheader with the Baltimore Orioles. Taking his place on the active roster is young right-hander Luis Guerrero, who has been recalled from Triple-A Worcester.

Newcomb was a surprise addition to the roster at the start of the season, as he had originally signed a minor league contract with an invitation to spring training over the offseason. After an impressive spring training, Newcomb saw himself win the fifth spot in the rotation after starters Kutter Crawford, Brayan Bello, and Lucas Giolito all ended up on the injured list during camp.

Newcomb would make five starts for Boston during his time in the rotation, tossing 22 1/3 innings and allowing 11 earned runs on 32 hits and 11 walks. He also struck out 27 as part of the rotation. Upon the return of injured starters Giolito and Bello, Newcomb was pushed into the bullpen, where he often served as a long man to preserve the rest of the bullpen. He appeared in six games in this role, tossing 17 2/3 innings and appearing to have more success as a reliever. He allowed only six runs on 22 hits and five walks but struck out 14.

With the Red Sox having three other left-handed relievers in their bullpen and need of a fresh arm, Newcomb was the casualty. It didn’t come as much of a surprise as the left-hander has thrown 139 pitches combined in his last three appearances while preserving the rest of the bullpen.

Guerrero has spent the 2025 season bouncing between Boston and Worcester, where he has had two different seasons. While with Boston Guerrero has yet to give up a run, appearing in three games and tossing four scoreless innings while striking out three. However, with Worcester, he has allowed 10 runs across 13 appearances. In 18 1/3 innings for Worcester, Guerrero has allowed five home runs and 10 walks but has struck out 16.

As demonstrated between Boston and Worcester, Guerrero relies on four pitches: a fastball, a changeup, a slider, and a splitter.

Having some of the best raw stuff in the organization, Guerrero could see himself thrown into a high-leverage role within the bullpen should he manage to keep walks under control up in Boston. Though upon his latest return to the majors, he’ll likely be used as a middle reliever.

The right-hander will provide much-needed assistance for the bullpen, which has been leaned upon due to short outings by the starting rotation over the last few series. A fresh arm is exactly what the team needs, and Guerrero will be a breath of fresh air for the team.

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[vegasbob]

Guerrero totally blew his high leverage chance Saturday #2 game giving up a 2 out , run scoring hit that sealed the Red Sox fate on a day when few in the lineup were able to hit and Marcelo K Mayer made his MLB debut watching pitches fly by him.

[Nick John]

5 hours ago, vegasbob said:

Guerrero totally blew his high leverage chance Saturday #2 game giving up a 2 out , run scoring hit that sealed the Red Sox fate on a day when few in the lineup were able to hit and Marcelo K Mayer made his MLB debut watching pitches fly by him.

Funny enough he ended up getting sent right back to Worcester after the game for Zack Kelly. He'll be back up at some point in June though.  

[mvp 78]

Maybe he passes through waivers and the Sox can keep him in the system?