Short answers, pulled from the story.
The Seattle Mariners have never appeared in the World Series, making them the only active MLB franchise with that distinction. Their deepest postseason run came in 2025, when they lost Game 7 of the ALCS to the Toronto Blue Jays after holding a 3-1 series lead, the closest the franchise has ever come to a World Series appearance.
The Mariners won 116 games in 2001, setting the American League record and tying the all-time MLB record set by the 1906 Chicago Cubs. Despite that record-setting season, they lost to the New York Yankees in the American League Championship Series.
In Game 5 of the 1995 ALDS, Edgar Martinez hit a walk-off double in the 11th inning that scored Ken Griffey Jr. from first base, clinching the series for Seattle. The moment is widely credited as a key reason professional baseball remained in Seattle.
The name "Mariners" was chosen by club officials in August 1976 from more than 600 submissions in a public contest that drew about 15,000 entrants. The winning entry was submitted by Roger Szmodis of suburban Bellevue, though the team was unable to reach him to award the prize.
Nintendo CEO Hiroshi Yamauchi purchased the Mariners after the 1992 season to thank Seattle for the city's role in Nintendo's success, despite having never attended a baseball game before the purchase. Yamauchi held a 49 percent share of the franchise.
Ichiro Suzuki holds the Mariners' career records for hits (2,542), stolen bases (438), and batting average (.321). He set the MLB single-season record with 262 hits in 2004, breaking a mark that had stood for 84 years, and his No. 51 was retired by the Mariners on the 9th of August 2025.