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 Mariners entered the 2025 season looking to erase the memory of 2024, when they not only coughed up the AL West to the Houston Astros yet again but also finished one game out of a Wild Card spot despite winning eight of their final 10 games to close the regular season.

You’d think after 49 years, the baseball gods would throw Seattle a bone. But nope—the Mariners remain the only active MLB franchise that’s never made it to the World Series.

With their 6-2 victory on Friday night, the Seattle Mariners stand on the brink of the first World Series appearance in the franchise's history. With one more w

The Seattle Mariners are the only franchise in sports history to still be suffering from an unavoidable drought.

To this point in the Mariners' franchise history, they have yet to make a World Series appearance and are the only MLB franchise to have never qualified for the Fall Classic. After being eliminated from the MLB playoffs this season, the 2025 World Series will mark the 48th Fall Classic since the Mariners became an MLB franchise in 1977.