Cole Young hit a three-run homer to give the Mariners a 5-4 lead in the fifth.
Jordan Eberle scored his 24th goal, and Bobby McMann had his 27th for Kraken.
Schlittler and Tuesday starter Max Fried have yet to give up a run this season
Seattle limps home after losing 6 of their last 7 games
Josh Naylor snaps his 0-20 hitless streak in a bright spot for Seattle
Raleigh entered the game as a pinch-hitter in the seventh.
Seattle has lost five of its past six games.
Hancock joined Félix Hernández as the only Mariners pitchers to strike out nine or more in a hitless outing of at least six innings.
Brendan Donovan hit a solo shot in his first at-bat with the franchise.
Expansion — and in Seattle’s case, a return — isn’t a done deal. But it’s not just a dream anymore, either.