In a dramatic extra-inning contest, Jorge Polanco drove in the winning run with a single to the outfield, clinching a 3-2 victory for the home team over the visiting squad in the decisive game of the American League Division Series.
Luis Castillo, making his first relief appearance in the major leagues, threw over an inning to earn the victory, sending his team to the ALCS for the first time since 2001.
The Mariners will now face the Toronto for the pennant in a contest between franchise brethren. Game 1 is set for Sunday in Toronto.
A Tigers hitter accounted for all of Detroit's scoring with a home run in the middle frames.
Seattle tied it at 2-2 in the seventh on a substitute batter's run-scoring hit.
Both teams threatened repeatedly in extra innings, with the home team hitting into inning-ending double plays in both the 12th and 13th.
The Tigers' ace and the Mariners' starter engaged in a pitchers' duel in the early innings.
The left-hander, a Cy Young Award contender, gave up a single score on two hits with no walks and 13 strikeouts over multiple frames. He established a postseason record with back-to-back K's.
The only run came in the second inning, when a double, stolen base, and sacrifice fly brought home a point for the Mariners.
The Mariners' pitcher began with shutout frames before surrendering a lead-off double in the sixth. After a bullpen move, the Tigers batter homered on a pitch to give the visitors the advantage.
Kirby went five-plus innings and was charged with one run on a few hits with no walks and six strikeouts.
This victory signifies a major achievement for the Mariners, who move forward to battle for a place in the World Series after a long playoff drought.