After another successful season on the Boston Red Sox's farm, we'll evaluate the best pitchers in the system by creating an all-prospect pitching staff. We'll select prospects to make up a starting rotation and bullpen, which will nicely complement our all-prospect team of position players.
We'll select a standard five-man rotation with eight relievers. To qualify, the prospects had to pitch in Single-A or above, and could not reach the majors. Unfortunately, that means Payton Tolle and Connelly Early are out of the mix, but the Red Sox still have plenty of other pitching prospects to get excited about after their work in 2025.
Red Sox 2025 All-Prospect Pitching Staff: New acquisitions and breakouts recognized
SP - Yhoiker Fajardo (RHP)
The list is in no particular order, except this one. Yhoiker Fajardo is the ace. Fajardo posted a 2.25 ERA, .204 BAA, and 1.10 WHIP in 19 appearances (17 starts) between the FCL and Single-A. The right-handed pitcher struck out 83 batters compared to 27 walks in 72 innings. He didn’t allow a single home run.
Fajardo was a lottery ticket prospect the Red Sox traded Cam Booser for. They may have hit the jackpot.
SP - Tyler Uberstine (RHP)
Tyler Uberstine threw zero innings in 2023 and 4 2/3 innings in 2024. He entered 2025 as a 25-year-old with under 40 innings in High-A and zero innings in Double-A. It’s excusable if you didn't expect massive things from him this season.
Uberstine delivered beyond anyone’s wildest expectations, though. The right-handed pitcher posted a 3.58 ERA, .244 BAA, and 1.26 WHIP in 25 games (21 starts) between Double-A and Triple-A. He struck out 137 batters and walked 41 in 120 2/3 innings.
SP - Hayden Mullins (LHP)
Hayden Mullins entered his final outing of 2025 with a chance to finish the season with a sub-2.00 ERA. The start didn’t go his way, but the overall season was still phenomenal.
Mullins posted a 2.21 ERA, .177 BAA, and 1.11 WHIP in 22 games (21 starts) between High-A and Double-A. The left-handed pitcher struck out 123 batters and walked 51 in 101 2/3 innings.
SP - John Holobetz (RHP)
John Holobetz was the “player to be named later” in the trade that sent Quinn Priester to the Milwaukee Brewers. Holobetz immediately proved that the label was a massive insult to his talent.
The right-handed pitcher posted a 3.03 ERA, .238 BAA, and 1.06 WHIP in 23 games (19 starts) between Single-A, High-A, and Double-A. He struck out 120 batters and only walked 20 in 124 2/3 innings. Holobetz tossed at least six innings in all six of his Double-A outings.
SP - Eduardo Rivera (LHP)
Eduardo Rivera was released by the Athletics during the 2024 season, and they’re definitely regretting that decision. The left-handed pitcher posted a 2.48 ERA, .177 BAA, and 1.16 WHIP in 20 appearances (15 starts) between High-A and Double-A. He struck out 108 batters compared to 46 walks in 87 innings.
Rivera flirts with 100 MPH and has showcased devastating breaking balls at times. He needs to find consistency, but the raw stuff is there.
RP - Yovanny Cruz (RHP)
Yovanny Cruz was brought in this offseason as a minor league free agent following stints in the Chicago Cubs and San Diego Padres organizations. The right-handed pitcher regularly topped out over 100 MPH while being one of the most consistent relievers in the system.
Cruz posted a 3.03 ERA, .171 BAA, and 1.31 WHIP over 34 appearances in Double-A. He struck out 72 batters in 59 1/3 innings. The issue came in the form of walks, as Cruz allowed 44 free passes. His overwhelming stuff lent itself to getting him out of any self-created jams, though.
RP - Matt McShane (RHP)
Matt McShane was another offseason acquisition, being brought in via trade with the Pittsburgh Pirates in exchange for reliever Chase Shugart. McShane appeared in 21 games between Single-A and High-A, posting a 2.55 ERA, .211 BAA, and 1.06 WHIP. The right-handed pitcher struck out 56 batters while only walking 11 in 42 1/3 innings.
RP - Jeremy Wu-Yelland (LHP)
Jeremy Wu-Yelland has had some bad injury luck over the years, which is extra frustrating considering how special his stuff is from the left side. He can hit upper-90s with his fastball, and if the Red Sox don’t lose him in the Rule 5 draft, he could become a left-handed reliever option in 2026.
The left-handed pitcher posted a 3.15 ERA, .201 BAA, and 1.07 WHIP in 25 appearances between High-A and Double-A. Wu-Yelland struck out 71 batters and walked just 16 over 45 2/3 innings.
RP - Cooper Adams (RHP)
Cooper Adams posted a 5.08 ERA with equal not-very-encouraging numbers across the board as an undrafted signee in High-A in 2024. However, he broke out in 2025.
The right-handed pitcher posted a 2.73 ERA, .224 BAA, and 1.15 WHIP in 31 appearances (one start) between High-A and Double-A. Adams struck out 80 batters while walking just 23 over 69 1/3 innings. He improved drastically in nearly every category and dominated in his 26 innings in Double-A. There’s reason to be optimistic about Adams.
RP - Alex Hoppe (RHP)
Alex Hoppe’s overall numbers might not be too appealing. The right-handed pitcher finished the year with a 4.55 ERA, .252 BAA, and 1.52 WHIP in 44 appearances between Double-A and Triple-A. However, he struck out 73 batters compared to 34 walks over 61 1/3 innings. Hoppe can hit 100 MPH with his fastball and has a devastating slider at times.
The numbers were also skewed by a handful of blowup outings. Hoppe was usually a trusty shutout option.
RP - Michael Sansone (LHP)
Michael Sansone started the season in Single-A and finished it with a stellar outing in Double-A. It’s safe to assume that someone who jumped multiple levels had a strong year.
The left-handed pitcher posted a 3.46 ERA, .249 BAA, and 1.11 WHIP in 27 games (seven starts) between Single-A, High-A, and Double-A. Sansone recorded 74 strikeouts and just 14 walks in 88 1/3 innings.
RP - Jonathan Brand (RHP)
Jonathan Brand had a strange season, as the organization seemed to move him around to fit needs. That makes it appear that they aren’t sure how they feel about it. He didn’t let that keep him down, though.
The right-handed pitcher posted a 3.16 ERA, .225 BAA, and 1.21 WHIP in 33 appearances between High-A, Double-A, and Triple-A. Brand struck out 59 batters and walked 20 in 51 1/3 innings.
RP - Isaac Stebens (RHP)
Isaac Stebens was perhaps the most dominant and consistent reliever in Boston’s organization in 2025. The right-handed pitcher recorded a 2.15 ERA, .198 BAA, and 1.27 WHIP in 38 appearances in High-A. He struck out 59 batters and walked 29 in 50 1/3 innings.