Red Sox Promote Eduardo Rivera to MLB from Double-A Amid Pitching Staff Challenges

POLICY WIRE — Boston, USA — The Boston Red Sox are set to elevate left-handed pitching prospect Eduardo Rivera directly from Double-A to the major leagues, signaling a significant roster adjustment due to mounting pitching injuries.

Rivera’s anticipated debut, scheduled before Wednesday’s game, comes as the team grapples with a severely depleted pitching staff. To facilitate his addition, right-hander Jack Anderson will be optioned to Triple-A Worcester.

Further roster shuffling sees first baseman Triston Casas moved to the 60-day injured list, creating a crucial 40-man roster spot for Rivera. Casas recently experienced a setback with an abdominal strain, and this move does not alter his projected return timeline, as he is not expected back in the immediate future.

Rising Star Joins Major League Ranks

The 22-year-old Rivera has demonstrated exceptional form this season, dominating in two starts for Double-A Portland. During his 10 innings pitched, he surrendered only one earned run while striking out an impressive 16 batters. Although he was promoted to Triple-A Worcester on Tuesday, he did not get an opportunity to pitch at that level before his major league call-up.

His last outing was on Thursday in Altoona, where he recorded nine strikeouts over 5 ⅔ innings. Initially, the Red Sox had planned for him to join the bullpen in Worcester; however, circumstances now suggest he will serve as a long reliever for the major league squad as they reconfigure their pitching rotation.

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Addressing Pitching Shortages

Boston’s pitching situation has reached a critical point just over three weeks into the season, described by some as a “fire drill.” The team is in dire need of a starter to fill the void left by Sonny Gray, who is currently on the injured list with a hamstring strain.

While Ranger Suárez is slated to start Wednesday and Brayan Bello on Thursday, Gray’s rotation spot is expected to come up again on Saturday during the series in Baltimore. Prospect Payton Tolle appears to be the most probable candidate to take Gray’s place, despite not having pitched in nine days.

The available pool of starting pitchers is significantly constrained, with Johan Oviedo (flexor strain) and Tyler Uberstine (shoulder inflammation) also sidelined. Additionally, both Kutter Crawford and Patrick Sandoval have been shut down following recent setbacks encountered during their respective rehabilitation assignments.

Rivera’s Background and Expectations

Rivera, a 6-foot-7 native of Puerto Rico, initially signed with the Red Sox as a minor league free agent in 2024. He was previously an Athletics prospect, drafted in the 10th round in 2021 before being released three years later.

SoxProspects ranks Rivera as the No. 33 prospect within the Boston organization. He compiled a strong 2025 season, achieving a 2.48 ERA across 87 innings pitched at both High-A and Double-A levels. Despite a historical struggle with a high walk rate during his minor league career, he recently showcased his talent by representing Puerto Rico in this year’s World Baseball Classic.

Recent Roster Activity

The outgoing Jack Anderson, a 26-year-old rookie, made his major league debut in Minneapolis on Wednesday and has appeared in three multi-inning relief outings. He holds a 3.38 ERA with six strikeouts over eight innings, though he allowed one run and four hits during Tuesday’s loss to the Yankees.

Rivera’s impending appearance will mark him as the fifth Red Sox pitcher to make their major league debut this season. He joins a list that includes Anderson, Tyler Samaniego, Uberstine, and Ryan Watson. This specific swap, involving Rivera and Anderson, represents the second pitching-related roster change for the Red Sox in the past 48 hours, following the recall of Samaniego and the placement of Gray on the 15-day injured list prior to Tuesday’s game.