San Francisco Giants vs Seattle Mariners
Series timeline
▲ San Francisco Giants ahead (peak +5)
▼ Seattle Mariners ahead (peak +4)
San Francisco Giants Seattle Mariners Tie Postseason One meeting per cell
Longest streaks: San Francisco Giants 4 (2020), Seattle Mariners 5 (2001–2009). Current: Seattle Mariners 2.
Splits
| Split | San Francisco Giants record |
|---|---|
| Regular season | 26-26 |
| Hosted by San Francisco Giants | 15-7 |
| Hosted by Seattle Mariners | 11-19 |
| Last 10 seasons (2009 to 2026) | 17-16 |
| Largest San Francisco Giants win | 10-1 (2018) |
| Largest Seattle Mariners win | 15-4 (1997) |
In the record book
- Closest rivalries#5 in MLB#20 across all leagues
Every meeting
2020s
| Season | Date | Winner | Score | Site | Round |
|---|---|---|---|---|---|
| 2026 (1-2) | Jul 17, 2026 | San Francisco Giants | 7-0 | at Seattle Mariners | |
| Jul 18, 2026 | Seattle Mariners | 4-3 | at Seattle Mariners | ||
| Jul 19, 2026 | Seattle Mariners | 6-3 | at Seattle Mariners | ||
| 2025 (3-0) | Apr 4, 2025 | San Francisco Giants | 10-9 | at San Francisco Giants | |
| Apr 5, 2025 | San Francisco Giants | 4-1 | at San Francisco Giants | ||
| Apr 6, 2025 | San Francisco Giants | 5-4 | at San Francisco Giants | ||
| 2024 (1-2) | Aug 23, 2024 | Seattle Mariners | 6-5 | at Seattle Mariners | |
| Aug 24, 2024 | San Francisco Giants | 4-3 | at Seattle Mariners | ||
| Aug 25, 2024 | Seattle Mariners | 4-3 | at Seattle Mariners | ||
| 2023 (1-2) | Jul 3, 2023 | Seattle Mariners | 6-5 | at San Francisco Giants | |
| Jul 4, 2023 | Seattle Mariners | 6-0 | at San Francisco Giants | ||
| Jul 5, 2023 | San Francisco Giants | 2-0 | at San Francisco Giants | ||
| 2021 (1-2) | Apr 1, 2021 | Seattle Mariners | 8-7 | at Seattle Mariners | |
| Apr 2, 2021 | San Francisco Giants | 6-3 | at Seattle Mariners | ||
| Apr 3, 2021 | Seattle Mariners | 4-0 | at Seattle Mariners | ||
| 2020 (4-0) | Sep 8, 2020 | San Francisco Giants | 6-5 | at San Francisco Giants | |
| Sep 9, 2020 | San Francisco Giants | 10-1 | at San Francisco Giants | ||
| Sep 16, 2020 | San Francisco Giants | 9-3 | at San Francisco Giants | ||
| Sep 17, 2020 | San Francisco Giants | 6-4 | at San Francisco Giants |
2010s
| Season | Date | Winner | Score | Site | Round |
|---|---|---|---|---|---|
| 2018 (2-2) | Apr 3, 2018 | Seattle Mariners | 6-4 | at San Francisco Giants | |
| Apr 4, 2018 | San Francisco Giants | 10-1 | at San Francisco Giants | ||
| Jul 24, 2018 | San Francisco Giants | 4-3 | at Seattle Mariners | ||
| Jul 25, 2018 | Seattle Mariners | 3-2 | at Seattle Mariners | ||
| 2015 (2-2) | Jun 15, 2015 | Seattle Mariners | 5-1 | at San Francisco Giants | |
| Jun 16, 2015 | San Francisco Giants | 6-2 | at San Francisco Giants | ||
| Jun 17, 2015 | Seattle Mariners | 2-0 | at Seattle Mariners | ||
| Jun 18, 2015 | San Francisco Giants | 7-0 | at Seattle Mariners | ||
| 2012 (1-2) | Jun 15, 2012 | San Francisco Giants | 4-2 | at Seattle Mariners | |
| Jun 16, 2012 | Seattle Mariners | 7-4 | at Seattle Mariners | ||
| Jun 17, 2012 | Seattle Mariners | 2-1 | at Seattle Mariners |
2000s
| Season | Date | Winner | Score | Site | Round |
|---|---|---|---|---|---|
| 2009 (1-2) | May 22, 2009 | Seattle Mariners | 2-1 | at Seattle Mariners | |
| May 23, 2009 | San Francisco Giants | 5-1 | at Seattle Mariners | ||
| May 24, 2009 | Seattle Mariners | 5-4 | at Seattle Mariners | ||
| 2006 (0-3) | Jun 16, 2006 | Seattle Mariners | 5-4 | at Seattle Mariners | |
| Jun 17, 2006 | Seattle Mariners | 8-1 | at Seattle Mariners | ||
| Jun 18, 2006 | Seattle Mariners | 5-1 | at Seattle Mariners | ||
| 2001 (1-2) | Jul 12, 2001 | Seattle Mariners | 4-3 | at Seattle Mariners | |
| Jul 13, 2001 | San Francisco Giants | 5-3 | at Seattle Mariners | ||
| Jul 14, 2001 | Seattle Mariners | 3-2 | at Seattle Mariners | ||
| 2000 (1-2) | Jun 9, 2000 | San Francisco Giants | 9-2 | at San Francisco Giants | |
| Jun 10, 2000 | Seattle Mariners | 5-2 | at San Francisco Giants | ||
| Jun 11, 2000 | Seattle Mariners | 9-2 | at San Francisco Giants |
1990s
| Season | Date | Winner | Score | Site | Round |
|---|---|---|---|---|---|
| 1999 (2-1) | Jun 11, 1999 | Seattle Mariners | 7-3 | at Seattle Mariners | |
| Jun 12, 1999 | San Francisco Giants | 15-11 | at Seattle Mariners | ||
| Jun 13, 1999 | San Francisco Giants | 8-4 | at Seattle Mariners | ||
| 1998 (2-1) | Jun 8, 1998 | San Francisco Giants | 4-3 | at San Francisco Giants | |
| Jun 9, 1998 | San Francisco Giants | 7-6 | at San Francisco Giants | ||
| Jun 10, 1998 | Seattle Mariners | 4-1 | at San Francisco Giants | ||
| 1997 (3-1) | Jun 17, 1997 | San Francisco Giants | 4-3 | at San Francisco Giants | |
| Jun 18, 1997 | San Francisco Giants | 4-2 | at San Francisco Giants | ||
| Jun 30, 1997 | San Francisco Giants | 8-6 | at Seattle Mariners | ||
| Jul 1, 1997 | Seattle Mariners | 15-4 | at Seattle Mariners |