Seattle Mariners

Active Franchise

49 seasons | 3689-4022 (.478)

The Seattle Mariners have played since 1977, a total of 49 seasons. The franchise's all-time record is 3,689-4,022 (.478). They have not won a World Series.

W (Wins):
Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
L (Losses):
Games charged to the pitcher of record when the opposing team took a lead it never surrendered.
Win% (Winning Percentage):
Wins divided by games decided.

Data updated

📊 Quick Stats

49 Seasons
3689 Wins
4022 Losses
.478 Win %
0 Titles
6 Playoffs

📈 Best & Worst Single Seasons

Best BA — 2001 .288 8% above the 2001 AL average (.266)
Worst BA — 2024 .224 6% below the 2024 AL average (.239)
Best ERA — 2014 3.17 17% better than the 2014 AL average (3.82)
Worst ERA — 1999 5.24 8% worse than the 1999 AL average (4.86)
Most R — 1996 993 14% above the 1996 AL average (872 R)
Fewest R — 2020 254 7% below the 2020 AL average (274 R)

📂 Quick Links

⭐ Notable Players 🏆 Playoff History 📅 All Seasons 🏢 All Franchises

⭐ All-Time Leaders

Top players by games played (min 100 games)

1
Edgar Martinez 1987-2004
2
Ichiro Suzuki 2001-2019
3
Ken Griffey 1989-2010
4
Kyle Seager 2011-2021
5
Jay Buhner 1988-2001

More Notable Players

Dan Wilson (1994-2005) Alvin Davis (1984-1991) Harold Reynolds (1983-1992) Raul Ibanez (1996-2013) Jose Lopez (2004-2010) J. P. Crawford (2019-2025) Dave Valle (1984-1993) Bret Boone (1992-2005) Jim Presley (1984-1989) Alex Rodriguez (1994-2000) Julio Cruz (1977-1983) Adrian Beltre (2005-2009) Robinson Cano (2014-2018) John Olerud (2000-2004) Bruce Bochte (1978-1982) Dylan Moore (2019-2025) Omar Vizquel (1989-1993) Dan Meyer (1977-1981) Dave Henderson (1981-1986) Mitch Haniger (2017-2024) Franklin Gutierrez (2009-2016) Cal Raleigh (2021-2025) Willie Bloomquist (2002-2015) Mike Cameron (2000-2003) Phil Bradley (1983-1987) Rich Amaral (1991-1998) Nelson Cruz (2015-2018) Julio Rodriguez (2022-2025) Yuniesky Betancourt (2005-2009) Henry Cotto (1988-1993) Mike Zunino (2013-2018) Dustin Ackley (2011-2015) Scott Bradley (1986-1992) Ty France (2020-2024) Michael Saunders (2009-2014) Al Cowens (1982-1986) Joey Cora (1995-1998) Tino Martinez (1990-1995) Ken Phelps (1983-1988) Richie Sexson (2005-2008) Justin Smoak (2010-2014) Carlos Guillen (1998-2003) Larry Milbourne (1977-1984) Greg Briley (1988-1992) Mark McLemore (2000-2003)

🏆 Playoff History (11)

2025
Seattle Mariners ALCS
Lost
2025
Seattle Mariners ALDS2
Won
2022
Seattle Mariners ALDS2
Lost
2022
Seattle Mariners ALWC2
Won
2001
Seattle Mariners ALCS
Lost
2001
Seattle Mariners ALDS1
Won
2000
Seattle Mariners ALCS
Lost
2000
Seattle Mariners ALDS2
Won
1997
Seattle Mariners ALDS2
Lost
1995
Seattle Mariners ALCS
Lost
1995
Seattle Mariners ALDS2
Won

📅 Season History

49 seasons on record

Franchise History

Wins per season — gold bars are World Series wins, silver are pennants.

2025 Seattle Mariners 90-72 2024 Seattle Mariners 85-77 2023 Seattle Mariners 88-74 2022 Seattle Mariners 90-72 2021 Seattle Mariners 90-72 2020 Seattle Mariners 27-33 2019 Seattle Mariners 68-94 2018 Seattle Mariners 89-73 2017 Seattle Mariners 78-84 2016 Seattle Mariners 86-76 2015 Seattle Mariners 76-86 2014 Seattle Mariners 87-75 2013 Seattle Mariners 71-91 2012 Seattle Mariners 75-87 2011 Seattle Mariners 67-95 2010 Seattle Mariners 61-101 2009 Seattle Mariners 85-77 2008 Seattle Mariners 61-101 2007 Seattle Mariners 88-74 2006 Seattle Mariners 78-84

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The Seattle Mariners franchise in brief

The quick stats for the Seattle Mariners read 49 seasons, 3689 wins, 4022 losses and a .478 percentage. The season list starts at 64-98 in 1977 and ends at 90-72 in 2025. The championships section is empty: no World Series title is on record. The Seattle Mariners reached the postseason in 6 seasons. In 2025 the club lost the AL Championship Series, the newest entry in the playoff history. The season history peaks at 116-46 in 2001 and bottoms out at 56-104 in 1978.

At the plate, the 2001 club's .288 is the high mark, compared with .266 for its league; the low was .224 in 2024. Pitching peaked in 2014, with a 3.17 team ERA against the league's 3.82; the 1999 staff was the least effective at 5.24. The 1996 team scored the most runs, 993; the 2020 team scored the fewest, 254. By games played for the franchise, the leaders are Edgar Martinez (1987-2004), Ichiro Suzuki (2001-2019), and Ken Griffey (1989-2010). The notable players list continues with Dan Wilson, Alvin Davis, and Harold Reynolds. Every season links to its own page, the latest being 2025 Seattle Mariners.

Seattle Mariners: Frequently Asked Questions

How many World Series have the Seattle Mariners won?
The Seattle Mariners have never won the World Series.
What is the all-time record of the Seattle Mariners?
The Seattle Mariners are 3,689-4,022 (.478) all-time across 49 seasons.
When were the Seattle Mariners founded?
The franchise's first major league season was 1977, and its last was 2025.
What was the best season in Seattle Mariners history?
By winning percentage, the franchise's best season was 2001, when the team went 116-46.
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