This article contains affiliate links. When you purchase through the links provided, we may earn a commission at no additional cost to you. Restrictions may apply. © 2026 baseball.realgm.com

The American League power struggle shifts to the Pacific Northwest this Monday as the New York Yankees open a high-stakes three-game series against the Seattle Mariners at T-Mobile Park. New York (3-0) arrives in Seattle firing on all cylinders after a dominant opening-week sweep, while the Mariners (2-2) look to protect their home turf after a hard-fought split against Cleveland. With both teams projected as AL contenders for the 2026 postseason, this early-season clash serves as a vital measuring stick. Catch the action live on Sling.

Tonight's series opener features a fascinating pitching matchup between Mariners ace Luis Castillo and Yankees left-hander Ryan Weathers. The Yankees’ offense has been relentless early on, led by the usual power of Aaron Judge and a resurgent Giancarlo Stanton. However, Seattle’s pitching staff remains one of the most disciplined in the majors, ranking in the top five for strikeouts per nine innings last season. The Mariners will rely on the star power of Julio Rodríguez and the elite power-hitting of catcher Cal Raleigh to break through New York's rotation. You can witness this AL showdown streaming live on Sling.

Seattle’s home-field advantage is significant, as the team posted one of the best home records in the AL last year. They’ll need that energy to combat a Yankees lineup that led MLB in home runs and slugging percentage during the 2025 campaign. All eyes will be on Luis Castillo, who recorded six strikeouts in his lone outing against the Bronx Bombers last year. For the Yankees, the priority is navigating a mounting injury list that currently includes Gerrit Cole and Anthony Volpe. This Monday night battle is a must-watch for baseball fans, and Sling is your home for the full broadcast.

How to watch Yankees vs. Mariners

Monday’s matchup will be broadcast on YES Network (Yankees feed) and Mariners.TV, with first pitch scheduled for 9:40 PM ET. Fans can stream the game in high definition on Sling, which offers access to top sports networks and local MLB coverage through various regional packages.

Yankees vs. Mariners Betting Odds & Predictions

The Mariners enter as slight home favorites, reflecting Castillo's reliability at T-Mobile Park and the Yankees' current rotation injuries. However, New York's unblemished start to the season has kept the moneyline extremely tight.

Prediction: While the Yankees' bats are hot, Luis Castillo's experience against this lineup should keep the score low. Expect a tight pitcher's duel that favors the home team in the late innings. Final Score: Mariners 4, Yankees 3.

Key Matchups: Pitching and Power

The primary matchup to watch is Luis Castillo's high-velocity fastball against Aaron Judge. Judge finished the 2025 season with 53 home runs and remains the focal point of the Yankees' offensive strategy.

Seattle relies on Cal Raleigh for middle-of-the-order production, while Julio Rodríguez remains one of the most dynamic five-tool threats in the game.

Stream MLB on Sling

Sling is a top-tier destination for MLB fans. Catch national broadcasts and local games with flexible streaming plans, ensuring you never miss a highlight from the Yankees or Mariners.

Sling: Check out current promotions to ensure you have access to ESPN, TBS, and regional sports networks for the 2026 MLB season. With Sling, you can follow the Mariners as they aim for the top of the AL West.

Frequently Asked Questions