The Seattle Mariners have begun their 2026 spring training with a focus on developing prospects and preparing for the upcoming season amid the World Baseball Classic (WBC). Manager Dan Wilson announced the first spring lineup, featuring promising prospects Colt Emerson and Michael Arroyo, who will get significant playing time. The team is adjusting to losing 16 players to the WBC, including key figures like Cal Raleigh, Julio Rodriguez, and Josh Naylor, prompting a strategic approach to training and roster management. The Mariners acquired left-handed pitcher Josh Simpson from the Miami Marlins to bolster their bullpen, and top prospect Kade Anderson is eager to capitalize on his spring training opportunity. Despite the WBC absences, the team is confident in their preparation, with most of their starting rotation expected to be ready for the season opener on March 26. The team’s spring schedule includes games broadcast on Mariners.TV and Seattle Sports 710 AM, with key pitchers like Emerson Hancock and Randy Dobnak scheduled for upcoming games. The Mariners are also navigating organizational changes, including the potential resignation of MLBPA union head Tony Clark. Overall, the team is optimistic about integrating prospects, managing player absences, and gearing up for a competitive season.