How to watch Guardians vs. Mariners: TV/streaming info, schedule, preview, starting pitchers

The 2026 debut of Sunday Night Baseball on NBC and Peacock will bring seven-time All-Star Jose Ramirez and the Cleveland Guardians to Seattle, Washington, for a matchup with the Mariners and Cal Raleigh, last year's MLB leader in home runs. Slade Cecconi will start for Cleveland, and Emerson Hancock will take the mound for Seattle. Both teams were division winners last year.

Cleveland won the AL Central but fell in the wild-card round to Detroit. Seattle captured the AL West crown but fell in the ALCS to Toronto. The game will feature brothers on opposing sides with Cleveland catcher Bo Naylor and his older brother, Josh, at first base for Seattle.

Both first-round draft picks, they were raised in Mississauga, Ontario, and were teammates on the Guardians from 2022-24. See below for additional information on how to watch the Diamondbacks vs. Dodgers and a breakdown of the game.

Also check out the schedule for the MLB on NBC and Peacock . There will be 27 prime-time MLB games featured across NBC, Peacock and NBCSN in 2026. NBC Sports will also stream one out-of-market game each day of the 2026 MLB season nationally on Peacock .