The Red Sox added three pitching prospects — right-handers David Sandlin and Tyler Uberstine and left-hander Shane Drohan — to their 40-man roster in advance of Tuesday’s Rule 5 Draft protection deadline.
To accommodate the additions of Sandlin, Uberstine, and Drohan, the Red Sox traded left-handers Brennan Bernardino and Chris Murphy to the Rockies and White Sox, respectively, for a pair of minor leaguers and designated righty Josh Winckowski for assignment.
Sandlin is currently regarded by MLB Pipeline as Boston’s No. 10 prospect, which ranks sixth among pitchers in the organization. The hard-throwing 24-year-old was originally selected by the Royals in the 11th round of the 2022 draft out of Oklahoma, then acquired by the Red Sox for reliever John Schreiber last February.
Sandlin opened the 2025 season with Double-A Portland, pitching to a 3.61 ERA (3.33 FIP) with 86 strikeouts to 27 walks over 17 outings (13 starts) spanning 82 1/3 innings in which he held opposing hitters to a .227 batting average. He received a promotion to Triple-A Worcester in late July but then struggled to a 7.61 ERA (5.27 FIP) in 15 appearances (one start) totaling 23 2/3 innings as he transitioned to a bullpen role ahead of a possible big league call-up.
That never came to fruition, but there is still plenty to like about Sandlin when it comes to his arsenal. The 6-foot-4, 215-pound hurler sits at 94-97 mph and reaches triple digits with his fastball. while also incorporating a slider, sweeper, splitter, and curveball into a diverse pitch mix.
Uberstine, a one-time USC hopeful who did not receive any scholarship offers coming out of high school, was Boston’s 19th-round pick in the 2021 draft out of Northwestern. After working his way back from June 2023 Tommy John surgery late last season, the 26-year-old opened the 2025 campaign at Portland and posted a 3.64 ERA (2.51 FIP) with 35 strikeouts to just four walks in six starts (29 2/3 innings) before receiving a promotion to Worcester in mid-May. From there, he forged a 3.56 ERA (4.92 FIP) with 102 strikeouts to 37 walks across 19 outings (15 starts) and 91 innings in which opponents batted .245 against him.
Altogether, Uberstine finished the season leading the Red Sox organization in innings pitched (120 2/3) and strikeouts (137). The 6-foot-1, 200-pound righty features a 92-94 mph fastball that tops out at 95 mph as well as a slider, a changeup, a cutter, and a curveball.
Unlike Sandlin and Uberstine, Drohan is already plenty familiar with the Rule 5 process. Boston’s fifth-round pick in the 2020 draft out of Florida State, the 26-year-old Drohan was left off the club’s 40-man roster when first eligible following the 2023 season and was subsequently scooped up by the White Sox in the Rule 5 Draft that December. He was, however, later returned to the Red Sox in June 2024 after undergoing a nerve decompression procedure in his left shoulder four months prior.
Drohan began the 2025 season in Worcester but was limited to 12 outings (11 starts) with Boston’s top affiliate due to left forearm inflammation that sidelined him from early May until late August. When on the mound, though, the 6-foot-3, 195-pound southpaw compiled a 2.27 ERA (2.85 FIP) with 67 strikeouts to 16 walks over 47 2/3 innings in which he held opposing hitters to a .185 batting average. He primarily operates with a 92-94 mph fastball that can reach 96 mph, a changeup, a curveball, a cutter, and a slider.
With the additions of Sandlin, Uberstine, and Drohan, the Red Sox now have a full 40-man roster. That means that other eligible prospects who were left off, like righties Yordanny Monegro (who is recovering from Tommy John surgery) and Jedixson Paez, lefties Eduardo Rivera and Hayden Mullins, and outfielders Miguel Bleis and Allan Castro, could be taken by other clubs in next month’s Rule 5 Draft.
(Picture of David Sandlin: Maddie Malhotra/Boston Red Sox/Getty Images)