Red Sox re-sign RHP prospect Reidis Sena to minor league contract

In addition to left-hander Eduardo Rivera, the Red Sox have re-signed right-hander Reidis Sena to a minor-league contract, according to MassLive.com’s Chris Cotillo.

Like Rivera, Sena was slated to become a free agent next month but is now in line to return to the only organization he has ever known in 2026. The 24-year-old Dominican native originally signed with the Red Sox for just $10,000 as an international free agent in December 2018. He is not currently ranked among the system’s top pitching prospects.

A member of Boston’s 2025 Spring Breakout roster to begin the year, Sena broke camp with Double-A Portland in April. The righty posted a 4.13 ERA (3.29 FIP) with 30 strikeouts to 19 walks through his first 15 outings (one start) and 24 innings for the Sea Dogs before landing on the injured list with a shoulder impingement in late June.

Upon returning to the mound in early August, Sena closed out the season by compiling a 2.55 ERA (3.74 FIP) with 19 strikeouts to 11 walks in 10 more appearances (one start) and 17 2/3 innings. Altogether, he forged a 3.46 ERA (3.48 FIP) with 49 strikeouts to 30 walks across 25 outings (two starts) spanning 41 2/3 innings for Portland in 2025. He converted six of his eight save opportunities while opposing hitters in the Eastern League batted just .186 against him.

Among the 144 pitchers who threw at least 40 innings in the Eastern League this year, Sena ranked sixth in groundball rate (54.7 percent), 14th in batting average against, 31st in strikeouts per nine innings (10.58), 34th in strikeout rate (27.4 percent), 38th in swinging-strike rate (13.6 percent), 58th in FIP, 59th in ERA, and 71st in xFIP (3.81). On the flip side, however, he also ranked 140th in walks per nine innings (6.48) and 141st in walk rate (16.8 percent), per FanGraphs.

Presumably larger than his listed height and weight of 5-foot-10 and 160 pounds, Sena throws from a vertical arm slot and incorporates a medium leg kick into his delivery. As noted in his SoxProspects.com scouting report, the undersized hurler features a 94-96 mph fastball that can reach 98 mph and complements it with a 90-92 mph cutter, 85-87 mph curveball, and 89-92 mph changeup.

Sena, who turns 25 in April, is Rule 5 Draft-eligible this offseason but is unlikely to be added to Boston’s 40-man roster ahead of the November 18 protection deadline. Assuming that happens and he does not get picked in the Rule 5 Draft itself in December, Sena is projected by SoxProspects.com to return to Portland’s bullpen for the start of the 2026 campaign.

In the meantime, Sena was assigned to the Tigres del Licey of the Dominican Winter League on October 15 but has yet to appear in a game for the club.