Seattle Mariners vs Washington Nationals head-to-head
Who has won more, the Seattle Mariners or the Washington Nationals?
Washington Nationals lead the series 24-13 in 37 meetings since Jun 10, 2003. They average 3.2 to 4.4. The last meeting was Jun 14, 2026, 10-1.
- Record
- Seattle Mariners 13-24 Washington Nationals
- Games
- 37
- Points per game
- 3.2 – 4.4
- Biggest win
- Washington Nationals by 9
Washington Nationals have won the last 2 meetings.
Every meeting on file
| Jun 14, 2026 |  SEA at  WSH | 1-10 | Washington Nationals | Regular |
| Jun 13, 2026 | SEA at WSH | 3-8 | Washington Nationals | Regular |
| Jun 12, 2026 | SEA at WSH | 10-2 | Seattle Mariners | Regular |
| May 29, 2025 | WSH at SEA | 9-3 | Washington Nationals | Regular |
| May 28, 2025 | WSH at SEA | 9-0 | Washington Nationals | Regular |
| May 27, 2025 | WSH at SEA | 1-9 | Seattle Mariners | Regular |
| May 26, 2024 | SEA at WSH | 9-5 | Seattle Mariners | Regular |
| May 25, 2024 | SEA at WSH | 1-3 | Washington Nationals | Regular |
| May 24, 2024 | SEA at WSH | 1-6 | Washington Nationals | Regular |
| Jun 28, 2023 | WSH at SEA | 4-1 | Washington Nationals | Regular |
| Jun 27, 2023 | WSH at SEA | 7-4 | Washington Nationals | Regular |
| Jun 26, 2023 | WSH at SEA | 4-8 | Seattle Mariners | Regular |
| Aug 24, 2022 | WSH at SEA | 3-1 | Washington Nationals | Regular |
| Aug 23, 2022 | WSH at SEA | 2-4 | Seattle Mariners | Regular |
| Jul 13, 2022 | SEA at WSH | 2-1 | Seattle Mariners | Regular |
| Jul 13, 2022 | SEA at WSH | 6-4 | Seattle Mariners | Regular |
| May 25, 2017 | SEA at WSH | 4-2 | Seattle Mariners | Regular |
| May 24, 2017 | SEA at WSH | 1-5 | Washington Nationals | Regular |
| May 23, 2017 | SEA at WSH | 1-10 | Washington Nationals | Regular |
| Aug 31, 2014 | WSH at SEA | 3-5 | Seattle Mariners | Regular |
| Aug 30, 2014 | WSH at SEA | 3-1 | Washington Nationals | Regular |
| Aug 29, 2014 | WSH at SEA | 8-3 | Washington Nationals | Regular |
| Jun 23, 2011 | SEA at WSH | 0-1 | Washington Nationals | Regular |
| Jun 22, 2011 | SEA at WSH | 1-2 | Washington Nationals | Regular |
| Jun 21, 2011 | SEA at WSH | 5-6 | Washington Nationals | Regular |
| Jun 15, 2008 | WSH at SEA | 6-2 | Washington Nationals | Regular |
| Jun 14, 2008 | WSH at SEA | 5-2 | Washington Nationals | Regular |
| Jun 13, 2008 | WSH at SEA | 7-6 | Washington Nationals | Regular |
| Jun 12, 2005 | SEA at WSH | 2-3 | Washington Nationals | Regular |
| Jun 11, 2005 | SEA at WSH | 1-2 | Washington Nationals | Regular |
| Jun 10, 2005 | SEA at WSH | 3-9 | Washington Nationals | Regular |
| Jun 13, 2004 | WSH at SEA | 1-8 | Seattle Mariners | Regular |
| Jun 12, 2004 | WSH at SEA | 0-3 | Seattle Mariners | Regular |
| Jun 11, 2004 | WSH at SEA | 0-1 | Seattle Mariners | Regular |
| Jun 12, 2003 | WSH at SEA | 0-1 | Seattle Mariners | Regular |
| Jun 11, 2003 | WSH at SEA | 3-1 | Washington Nationals | Regular |
| Jun 10, 2003 | WSH at SEA | 7-3 | Washington Nationals | Regular |
Completed games on file, which start in 2003 — not the clubs’ full all-time series. Regular season 37, postseason 0.