| 41 | 0 | 9% |
| Seasons | Championships | Playoff Percentage |
The Seattle Mariners have played a total of 41 seasons. Their first season was in 1977, and their most recent season was in 2018.
The Seattle Mariners last made the playoffs in 2001, when they lost the AL Championship Series. They've been in the playoffs a total of 4 times in their 41 seasons.
The Seattle Mariners have never won a championship. The closest they came to winning a championship was in 1995, 2000 and 2001 when they lost the AL Championship Series.
| Year | Result |
|---|---|
| 2018 | Missed Playoffs |
| 2017 | Missed Playoffs |
| 2016 | Missed Playoffs |
| 2015 | Missed Playoffs |
| 2014 | Missed Playoffs |
| 2013 | Missed Playoffs |
| 2012 | Missed Playoffs |
| 2011 | Missed Playoffs |
| 2010 | Missed Playoffs |
| 2009 | Missed Playoffs |
| 2008 | Missed Playoffs |
| 2007 | Missed Playoffs |
| 2006 | Missed Playoffs |
| 2005 | Missed Playoffs |
| 2004 | Missed Playoffs |
| 2003 | Missed Playoffs |
| 2002 | Missed Playoffs |
| 2001 | Lost AL Championship Series (Won 1 Round) |
| 2000 | Lost AL Championship Series (Won 1 Round) |
| 1999 | Missed Playoffs |
| 1998 | Missed Playoffs |
| 1997 | Lost AL Divisional Series (Won 0 Rounds) |
| 1996 | Missed Playoffs |
| 1995 | Lost AL Championship Series (Won 1 Round) |
| 1993 | Missed Playoffs |
| 1992 | Missed Playoffs |
| 1991 | Missed Playoffs |
| 1990 | Missed Playoffs |
| 1989 | Missed Playoffs |
| 1988 | Missed Playoffs |
| 1987 | Missed Playoffs |
| 1986 | Missed Playoffs |
| 1985 | Missed Playoffs |
| 1984 | Missed Playoffs |
| 1983 | Missed Playoffs |
| 1982 | Missed Playoffs |
| 1981 | Missed Playoffs |
| 1980 | Missed Playoffs |
| 1979 | Missed Playoffs |
| 1978 | Missed Playoffs |
| 1977 | Missed Playoffs |
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