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Cubs Prospect Mason McGwire Shines in First Start After Year Lost to Injury

The 22-year-old right-hander is reestablishing himself following a lost 2025 season.

Overview

  • Mason McGwire opened his 2026 starting role with four scoreless innings Sunday against the Kannapolis Cannon Ballers, allowing one hit with five strikeouts and no walks in a 7-3 Myrtle Beach win.
  • Through four outings this season for the Single-A Pelicans, he has a 0.90 ERA with 15 strikeouts across 10 innings.
  • He worked out of the bullpen in his first three 2026 appearances, and the move to a start signals progress in workload and recovery.
  • The Cubs drafted McGwire in the eighth round in 2022, he pitched in the Arizona Complex League in 2023, debuted in Single-A in 2024, and then missed 2025 due to injury.
  • MLB’s official X account posted highlights of his Sunday start on Monday, boosting national attention on the Cubs prospect who is also Mark McGwire’s son.