The Red Sox swung a significant trade with the Cardinals on Tuesday, acquiring veteran starter Sonny Gray and cash considerations for right-hander Richard Fitts, minor league left-hander Brandon Clarke, and a player to be named later or cash considerations.
This article will focus on Clarke, who was ranked by MLB Pipeline as Boston’s No. 5 prospect and is now the No. 7 prospect in St. Louis’ farm system.
Clarke was selected by the Red Sox in the fifth round (148th overall) of the 2024 draft out of State College of Florida, Manatee-Sarasota. The Virginia native had been committed to transferring to South Carolina for his senior season before signing with Boston for an under-slot $400,000 last July.
Clarke did not make his professional debut until he broke camp with Low-A Salem to begin the 2025 campaign. On the heels of an eye-opening spring training, the 22-year-old lefty dominated Carolina League hitters to the tune of a 0.93 ERA (0.98 FIP) with 17 strikeouts to just two walks in three starts (9 2/3 innings). He was then rewarded with a promotion to High-A Greenville in late April.
Upon making the jump to the hitter-friendly South Atlantic League, Clarke saw his stock rise even further as he vaulted into the back end of Baseball America’s Top 100 prospects list for a brief period. After tossing 4 2/3 scoreless innings against Bowling Green on May 24, however, Clarke was sidelined for the next month-plus with a blister caused by a hangnail.
Clarke returned to the mound in late June but struggled for the most part over the summer before being shut down again in August due to a recurrence of blisters. He ended the season on Greenville’s injured list, having posted a 5.08 ERA (4.17 FIP) with 43 strikeouts to 25 walks in 11 starts (28 1/3 innings) for the Drive.
Overall, Clarke forged a 4.03 ERA (3.36 FIP) with 60 strikeouts to 27 walks over 14 total starts (38 innings) between Salem and Greenville in 2025. Opposing hitters batted just .128 against him altogether, though struggles with command and control (as indicated by his 15.5 percent walk rate) generated concerns about his outlook moving forward.
Even with those concerns, there is no doubting the potency of Clarke’s stuff. The 6-foot-4, 220-pound southpaw primarily operates with an upper-90s fastball (both two- and four-seam) that can reach triple-digits, an 87-90 mph slider, an 81-85 mph sweeper, and an 87-89 mph changup.
“In terms of pure talent, what’s coming out of his hand and the [arm] extension he gets, it’s right up there with anybody in the minor leagues,” Cardinals president of baseball operations (and former Red Sox chief baseball officer) Chaim Bloom said of Clarke. “You really could put him on that short list of highest talent/most upside in the minor leagues.”
Clarke, who turns 23 in April, seems likely to open the 2026 season with the Cardinals’ High-A affiliate in Peoria, Ill. If he can stay healthy and further harness his command and control, he has tremendous upside as a starter. If not, he still projects as a reliever at the big league level in the long term.
(Picture of Sonny Gray: Dilip Vishwanat/Getty Images)