The only Major League Baseball (MLB) team that has never played in the World Series is the Seattle Mariners.
The World Series represents the pinnacle of professional baseball, serving as the championship series of Major League Baseball. Teams battle through a rigorous regular season and playoffs to earn the right to compete for the Commissioner's Trophy. While many franchises have achieved this feat, the Seattle Mariners stand alone as the sole team never to have reached the World Series.
Teams That Have Played but Never Won
Despite the long history of MLB, several other franchises have made it to the World Series but have yet to secure a championship title. These teams have come close to winning the sport's ultimate prize but ultimately fell short. Notably, some of these teams have even reached the Series multiple times.
Below is a summary of MLB teams that have appeared in the World Series but have never managed to win the championship, alongside the Seattle Mariners' unique status:
| Team | World Series Appearances | Won World Series? | Notes |
|---|---|---|---|
| Seattle Mariners | 0 | No | Only MLB franchise never to appear |
| Milwaukee Brewers | 1 | No | Appeared once (1982) |
| San Diego Padres | 2 | No | Appeared twice (1984, 1998) |
| Tampa Bay Rays | 2 | No | Appeared twice (2008, 2020) |
| Colorado Rockies | 1 | No | Appeared once (2007) |
This highlights the challenge and prestige associated with not only reaching but also winning the World Series, a feat that has eluded several established franchises in MLB history.
