Overview
- A 103.8‑mph comebacker off Christian Moore struck Anderson on his pitching arm in the fourth inning and he was removed after 3.1 scoreless innings.
- Mariners trainers attended the mound and left‑hander Michael Rucker replaced Anderson with one out in the fourth inning.
- The club has characterized the injury as a forearm bruise and Anderson remained in the home dugout for initial evaluation rather than going to the clubhouse.
- No public confirmation of imaging, a formal medical diagnosis beyond the bruise label, or a move to the injured list has been reported.
- Anderson is a 21‑year‑old who was the No. 3 overall pick in 2025 and reached the majors after one season, so any arm issue could affect Seattle’s near‑term rotation plans.