Seattle RHP Luis Castillo starts Game 4 Thursday against RHP Max Scherzer.
The Seahawks stay in the AFC South and host Houston next Monday night.
George Springer homered on the first pitch from Miller, who then escaped a two-on jam in a 27-pitch first inning.
Vince Dunn and Jared McCann also scored for the Kraken, who had gone 0-3-1 in their previous four openers, including a 5-4 overtime loss to Anaheim in 2022.
Game 5 is in Seattle on Friday.
Seattle RHP Bryce Miller are expected to start Game 4 on Wednesday.
The Capitol building is back open to the public, but certain spaces are closed off as the damage starts to get repaired.
Darnold and Mayfield combine for 720 yards, just 10 incompletions
Logan Gilbert scheduled to start game 3 Tuesday in Detroit
M’s will face Tigers’ ace Skubal in Sunday’s game 2
