TORONTO — The Seattle Mariners are halfway to the first pennant in franchise history, and they haven’t even played a home game yet in this American League Championship Series.

Seattle flattened the Toronto Blue Jays, 10-3, in Game 2 at Rogers Centre on Monday. Julio Rodríguez and Jorge Polanco ripped three-run homers for the Mariners, and Josh Naylor — who had three hits — connected on a two-run blast in the seventh.

The Mariners started two pitchers who were working on short rest, getting six innings from Bryce Miller in Game 1 and three from Logan Gilbert on Monday. They now return to T-Mobile Park for Game 3 on Wednesday, when George Kirby will start on regular rest, with Luis Castillo lined up for Game 4.

Seattle has lost its previous three trips to the ALCS, winning two games in 19

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