The Seattle Mariners are feeling the impact of the 2026 World Baseball Classic with 18 players representing their organization in the tournament, including All-Star center fielder Julio Rodriguez and closer Andres Munoz. The mass exodus has left noticeable gaps in the clubhouse at the Peoria Sports Complex, with fan mail piling up and gear waiting for returning stars.

Seattle's front office sent a quarter of its 40-man roster to the WBC, more than any other MLB team. President of baseball operations Jerry Dipoto acknowledged the challenges while emphasizing the benefits of international competition. The Mariners brought in 77 players for spring training to compensate for the absences, creating logistical challenges for clubhouse staff who had to add extra lockers to accommodate the expanded roster.

While teammates back in camp watch the games with both entertainment and trepidation, manager Dan Wilson and his coaching staff are carefully monitoring player performances for execution rather than results. The absence of key players has created unexpected opportunities for others like veteran catcher Mitch Garver, who joined the team after spring training began and is getting more playing time with Cal Raleigh competing for Team USA.