Seattle Mariners vs Washington Nationals
Series timeline
▲ Seattle Mariners ahead (peak +2)
▼ Washington Nationals ahead (peak +11)
Seattle Mariners Montreal Expos Washington Nationals Tie Postseason One meeting per cell
Longest streaks: Seattle Mariners 4 (2003–2004), Washington Nationals 11 (2005–2014). Current: Washington Nationals 2.
Splits
| Split | Seattle Mariners record |
|---|---|
| Regular season | 13-24 |
| Hosted by Seattle Mariners | 8-12 |
| Hosted by Washington Nationals | 5-12 |
| Last 10 seasons (2005 to 2026) | 9-22 |
| Largest Seattle Mariners win | 9-1 (2025) |
| Largest Washington Nationals win | 10-1 (2017) |
In the record book
- Most lopsided series#85 in MLB
Every meeting
2020s
| Season | Date | Winner | Score | Site | Round |
|---|---|---|---|---|---|
| 2026 (1-2) | Jun 12, 2026 | Seattle Mariners | 10-2 | at Washington Nationals | |
| Jun 13, 2026 | Washington Nationals | 8-3 | at Washington Nationals | ||
| Jun 14, 2026 | Washington Nationals | 10-1 | at Washington Nationals | ||
| 2025 (1-2) | May 27, 2025 | Seattle Mariners | 9-1 | at Seattle Mariners | |
| May 28, 2025 | Washington Nationals | 9-0 | at Seattle Mariners | ||
| May 29, 2025 | Washington Nationals | 9-3 | at Seattle Mariners | ||
| 2024 (1-2) | May 24, 2024 | Washington Nationals | 6-1 | at Washington Nationals | |
| May 25, 2024 | Washington Nationals | 3-1 | at Washington Nationals | ||
| May 26, 2024 | Seattle Mariners | 9-5 | at Washington Nationals | ||
| 2023 (1-2) | Jun 26, 2023 | Seattle Mariners | 8-4 | at Seattle Mariners | |
| Jun 27, 2023 | Washington Nationals | 7-4 | at Seattle Mariners | ||
| Jun 28, 2023 | Washington Nationals | 4-1 | at Seattle Mariners | ||
| 2022 (3-1) | Jul 13, 2022 | Seattle Mariners | 6-4 | at Washington Nationals | |
| Jul 13, 2022 | Seattle Mariners | 2-1 | at Washington Nationals | ||
| Aug 23, 2022 | Seattle Mariners | 4-2 | at Seattle Mariners | ||
| Aug 24, 2022 | Washington Nationals | 3-1 | at Seattle Mariners |
2010s
| Season | Date | Winner | Score | Site | Round |
|---|---|---|---|---|---|
| 2017 (1-2) | May 23, 2017 | Washington Nationals | 10-1 | at Washington Nationals | |
| May 24, 2017 | Washington Nationals | 5-1 | at Washington Nationals | ||
| May 25, 2017 | Seattle Mariners | 4-2 | at Washington Nationals | ||
| 2014 (1-2) | Aug 29, 2014 | Washington Nationals | 8-3 | at Seattle Mariners | |
| Aug 30, 2014 | Washington Nationals | 3-1 | at Seattle Mariners | ||
| Aug 31, 2014 | Seattle Mariners | 5-3 | at Seattle Mariners | ||
| 2011 (0-3) | Jun 21, 2011 | Washington Nationals | 6-5 | at Washington Nationals | |
| Jun 22, 2011 | Washington Nationals | 2-1 | at Washington Nationals | ||
| Jun 23, 2011 | Washington Nationals | 1-0 | at Washington Nationals |
2000s
| Season | Date | Winner | Score | Site | Round |
|---|---|---|---|---|---|
| 2008 (0-3) | Jun 13, 2008 | Washington Nationals | 7-6 | at Seattle Mariners | |
| Jun 14, 2008 | Washington Nationals | 5-2 | at Seattle Mariners | ||
| Jun 15, 2008 | Washington Nationals | 6-2 | at Seattle Mariners | ||
| 2005 (0-3) | Jun 10, 2005 | Washington Nationals | 9-3 | at Washington Nationals | |
| Jun 11, 2005 | Washington Nationals | 2-1 | at Washington Nationals | ||
| Jun 12, 2005 | Washington Nationals | 3-2 | at Washington Nationals | ||
| 2004 (3-0) | Jun 11, 2004 | Seattle Mariners | 1-0 | at Seattle Mariners | |
| Jun 12, 2004 | Seattle Mariners | 3-0 | at Seattle Mariners | ||
| Jun 13, 2004 | Seattle Mariners | 8-1 | at Seattle Mariners | ||
| 2003 (1-2) | Jun 10, 2003 | Montreal Expos | 7-3 | at Seattle Mariners | |
| Jun 11, 2003 | Montreal Expos | 3-1 | at Seattle Mariners | ||
| Jun 12, 2003 | Seattle Mariners | 1-0 | at Seattle Mariners |