Overview

• The left-hander, a 2024 second-round pick, rocketed from High-A to Triple-A in five months before the call-up.
• Across three levels this year, he posted a 3.04 ERA and 0.99 WHIP with 133 strikeouts in 91 2/3 innings.
• Scouts cite a mid-to-upper-90s fastball that touched 98.6 mph, elite extension, and top-tier whiff rates on his four-seamer.
• The move follows Walker Buehler’s shift to the bullpen, and reporting indicates Boston intends to evaluate Tolle as a starter.
• Ken Rosenthal was first to report the promotion, with MLB.com and local outlets adding that a 40-man spot could be cleared via a Marcelo Mayer 60-day IL transfer.