Raul Ibanez again treated Yankee Stadium as his personal playground, hitting a grand slam and two-run homer Wednesday night to help the Seattle Mariners rout New York 12-2.

Ibanez’s slam came during a seven-run first inning. Yankees backup shortstop Alberto Gonzalez got the final out in the ninth inning in his first professional pitching appearance.

Every Seattle starter had at least one of its season-high 16 hits and Jesus Montero was the only starter who failed to score a run in the Mariners’ best output this year.