No, the Seattle Mariners have never won a World Series. In fact, they are the lone MLB team of 30 to never even reach a World Series, never having made that deep of a postseason run in their 50-plus years of existence.

The Seattle Mariners remain MLB's only active franchise without a World Series appearance after their 2025 ALCS Game 7 loss to the Blue Jays.

Mariners' Game 7 history gets incredible boost from this winner-take-all record originally appeared on The Sporting News. Add The Sporting News as a Preferred Source by clicking here. The Seattle Mariners ' magical season all comes down to this. A win in ALCS Game 7 and it's on to the World Series. A loss and it's back home for the winter.

Edgar Martinez, the Hall of Famer, was a beast in the 1995 ALDS. He was 12 for 21 (.571) with three doubles, two homers and 10 RBI in the five-game series. This series-clinching walk-off double with fellow Hall of Famer Ken Griffey Jr. sliding into home is an enduring image:

Mariners fans have long known the agony and (very occasional) ecstasy of rooting for a team with a record bumpier than a plane flying over the Cascades. But they’re still

In a season full of MVP moments for Cal Raleigh, the Mariners’ catcher might have authored his most epic yet. And just a few minutes later, Eugenio Suárez ensured that he’ll never buy a drink in this town again.

The Mariners are going to play for the American League Championship. I don’t believe it. It just continues. My oh my,” former commentator Dave Niehaus said, exclaiming in excitement at the end of game five in the 1995 American League Divisional Series.