The Red Sox promoted Tolle from High-A Greenville to Double-A Portland on Sunday, Josh Ball of Beyond the Monster reports.
The 22-year-old lefty will move up to Double-A after producing a 3.62 ERA and 1.17 WHIP with 79 strikeouts over 49.2 innings in 11 appearances (10 starts) with Greenville this season. The No. 50 overall pick in the 2024 First-Year Player Draft, Tolle is less than a year into his professional career, but he's already established himself as one of Boston's top pitching propects.