The Senators went to the World Series 3 times, as the previous incarnation (1901-1960) of the Minnesota Twins:
The Seattle Mariners have reached the Postseason 4 times as of 2011
Wildcard Era (1995-2011)
1. 1995 | 79-66 | AL West - Won ALDS (NYY 3-2), Lost ALCS (CLE 2-4)
2. 1997 | 90-72 | AL West - Lost ALDS (BAL 1-3)
3. 2000 | 91-71 | AL Wildcard - Won ALDS (CHW 3-0), Lost ALCS (NYY 2-4)
4. 2001 | 116-46 | AL West - Won ALDS (CLE 3-2), Lost ALCS (NYY 1-4)
As of the start of the 2008 season, the Mariners have never played in a World Series.
The Seattle Mariners is one of two Major League Baseball franchises that have never appeared in a World Series. The Washington Nationals in the other.
Twice, once in the Kingdome, once at Safeco Field.
No.
The Seattle Mariners have never played in the World Series.
No. They went to the World Series in 2008 and lost to Philadelphia Phillies. That was their only World Series appearance.
No they have not.
The Seattle Mariners, Texas Rangers and Washington Nationals have never been to the World Series.
The Seattle Mariners, the Washington Nationals, and the Texas Rangers are the only teams that have never made it to the World Series.
As of 2010, never.
The Mariners have never won the world series.
Washington NationalsSeattle MarinersTexas Rangers
No. The Mariners have never won the AL and advanced to the World Series.
We are yet to win a World Series.
Seattle Mariners, Washington Nationals
They have never won a World Series title.