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Red Sox Add Catcher Matt Thaiss on Minor-League Deal With Spring Invite

The 30-year-old arrives on a non-roster deal to deepen Boston’s catching group behind Carlos Narvaez.

Overview

  • Thaiss agreed to a minor-league contract with an invitation to major-league spring training, as first reported by Andrew Parker of SoxProspects.
  • A former 2016 first-round pick by the Angels, Thaiss is positioned as depth who could push Connor Wong for Boston’s backup role.
  • He split 2025 between the White Sox and Rays, posting a .218/.349/.288 line with an 89 wRC+ in a backup capacity.
  • Defensive reviews were mixed last season, with +3 Defensive Runs Saved and solid blocking but poor Statcast marks for caught stealing, framing, and pop time.
  • Thaiss bats left-handed, carries an above-average walk rate with generally mid-80s wRC+ offense, and is reported to be out of minor-league options with more than three years of service time.