Seattle defeats Washington 10-2 in the opener of a three-game series after a long rain delay Friday night. Rookie Colt Emerson provides the key early burst, hitting a home run and helping Seattle score five runs in the second inning. The Mariners take advantage of Washington’s miscues and add to the lead with extra bases and late scoring. Dominic Canzone drives in runs with a two-run triple in the second and then later contributes with a home run in the eighth. Miles Mastrobuoni adds a sacrifice fly, and additional Seattle runs come via a wild pitch and timely hitting, including Luke Raley’s two-run single in the fifth and runs scored by Josh Naylor and others later in the game.

On the mound, Bryce Miller holds Washington in check, allowing two runs over a career-high eight innings with seven strikeouts and no walks. The Nationals respond with a home run from James Wood and later blasts that prevent a shutout. Washington finishes the night below .500 at 12-21 at home. Randy Arozarena leaves the game in the third inning with an apparent leg injury. The game is delayed 2 hours, 11 minutes at the start.