Tue Apr 15 21:50:00 UTC 2025: ## Mariners Prospect Makes MLB Debut on Jackie Robinson Day
**Seattle, WA** – The Seattle Mariners opened a three-game series against the Cincinnati Reds today, marking a significant day for the team with a prospect debut and a homecoming for pitcher Luis Castillo. The game, played on Jackie Robinson Day, saw top Mariners prospect Ben Williamson make his major league debut, starting at third base. This continues a recent Mariners tradition, following Jonatan Clase’s debut on Jackie Robinson Day last year.
Williamson’s debut is part of a larger roster shuffle for the Mariners, who also optioned Noelvi Marte and activated Matt McLain and Austin Hays. The Mariners’ lineup featured a right-handed heavy batting order against the Reds’ left-handed pitcher, Nick Lodolo.
Castillo, pitching for the Mariners against his former team in Cincinnati, led the pitching effort. The game was broadcast on ROOT Sports NW and Seattle Sports 710 AM.
The Mariners’ game also highlighted the annual celebration of Jackie Robinson Day, commemorating the legendary baseball player’s breaking of the color barrier. The team’s history on Jackie Robinson Day includes notable moments, such as Ken Griffey Jr.’s 400th Mariners home run in 2009.
First Piper 