According to Jeff Passan, Red Sox LHP prospect Brandon Clarke is being traded to the Cardinals as part of the package for RHP Sonny Gray.
Clarke is the Red Sox’s fifth-ranked prospect, according to MLB Pipeline, so this is a great get for the Cardinals. The 22-year-old posted a 4.03 ERA, 1.16 WHIP, and 60/27 K/BB ratio in 38 innings in 2025 in his first professional season, spent mostly at High-A. Clarke possesses an upper-90s fastball from the left side with a wipeout slider. He also has a curve and changeup that he can mix in to right-handed pitchers, and has all the makings of a high-end prospect. However, the Red Sox also have Connelly Early, Payton Tolle, Kyle Harrison, and Kyson Witherspoon, among others, and a team can only have so many pitching prospects with a realistic shot to crack the starting rotation.