Then, the M's will 'spring' into action. On Feb. 20, the Mariners will play their Cactus League opener vs. the San Diego Padres. The team is scheduled to play 31 games in 32 days from the initial match-up through March 23, 2026. That's a prolific pace to kick things off, but that often helps successful teams to come together more quickly.

From an MLB Opening Day doubleheader on March 26 to the Wild Card round of the playoffs, NBC Sports’ 2026 schedule delivers wall-to-wall coverage.

Following a successful 2025 season when they fell just short of reaching the World Series, the Mariners' focus has moved to 2026. On Wednesday the Mariners released their 2026 Cactus League schedule. Seattle will play its first spring training game Feb. 20 vs.