Overview

• Tolle, 22, was a 2024 second-round pick who climbed from High-A to Triple-A in his first pro season before this reported promotion.
• Across three levels in 2025, he posted a 3.04 ERA, a 0.99 WHIP and 133 strikeouts in 91 2/3 innings, per the Boston Globe.
• The left-hander is expected to start Friday at Fenway Park against the Pirates, with Paul Skenes slated for Pittsburgh, according to multiple reports.
• Boston opened a rotation slot after moving Walker Buehler to the bullpen, with Richard Fitts sidelined by right-arm neuritis and Dustin May pushed to Saturday.
• A 40-man spot could be created by transferring Marcelo Mayer to the 60-day injured list, and scouting reports highlight Tolle’s upper-90s fastball, standout extension and a growing mix of secondary pitches.