Overview
- MLB published the full 2027 regular-season schedule on July 16, 2026, and the Seattle Mariners released their complete team slate the same day.
- MLB designated an Opening Night for Wednesday, March 24 that will be streamed on Netflix with the specific matchup still to be announced.
- The Mariners are scheduled to open on Thursday, March 25 with a seven-game homestand at T-Mobile Park that begins with a four-game series against the Boston Red Sox.
- Seattle’s regular season closes on the road against the Athletics, who will play 2027 in Sacramento while preparing to relocate to Las Vegas for the 2028 season.
- The collective bargaining agreement expires Dec. 1, 2026, and unresolved labor talks create a real risk of a lockout that could delay Opening Day and disrupt tickets, travel and broadcast plans.