The Red Sox had 10 players make their MLB debut in 2025.
Richard Fitts was the most high-profile prospect to the group. The 24-year-old righty, who Boston acquired from the Yankees last offseason in the Alex Verdugo trade, allowed just four earned runs in 20 ⅔ innings (1.74 ERA) over four starts after being promoted from Triple-A Worcester on Sept. 8.
