@ Mariners
8-12
@ Nationals
5-10
Playoffs
0-0
VS EXPECTED
Mariners -6.5
Avg Runs
3.2-4.1
Most Recent Winner
Mariners 10-2
Head-To-Head Margin (Max Last 150 Matches)
| Date | Matchup | Result | Winner | Model Projection | Stage |
|---|---|---|---|---|---|
| Jun 12, 2026 | 10–2 | Seattle Mariners +8 | Seattle Mariners +0.4 | Regular | |
| May 29, 2025 | 9–3 | Washington Nationals +6 | Seattle Mariners +0.9 | Regular | |
| May 28, 2025 | 9–0 | Washington Nationals +9 | Seattle Mariners +1.0 | Regular | |
| May 27, 2025 | 1–9 | Seattle Mariners +8 | Seattle Mariners +0.9 | Regular | |
| May 26, 2024 | 9–5 | Seattle Mariners +4 | Seattle Mariners +0.5 | Regular | |
| May 25, 2024 | 1–3 | Washington Nationals +2 | Seattle Mariners +0.6 | Regular | |
| May 24, 2024 | 1–6 | Washington Nationals +5 | Seattle Mariners +0.6 | Regular | |
| Jun 28, 2023 | 4–1 | Washington Nationals +3 | Seattle Mariners +1.3 | Regular | |
| Jun 27, 2023 | 7–4 | Washington Nationals +3 | Seattle Mariners +1.4 | Regular | |
| Jun 26, 2023 | 4–8 | Seattle Mariners +4 | Seattle Mariners +1.3 | Regular | |
| Aug 24, 2022 | 3–1 | Washington Nationals +2 | Seattle Mariners +1.5 | Regular | |
| Aug 23, 2022 | 2–4 | Seattle Mariners +2 | Seattle Mariners +1.4 | Regular | |
| Jul 13, 2022 | 6–4 | Seattle Mariners +2 | Seattle Mariners +0.8 | Regular | |
| Jul 13, 2022 | 2–1 | Seattle Mariners +1 | Seattle Mariners +0.8 | Regular | |
| May 25, 2017 | 4–2 | Seattle Mariners +2 | Washington Nationals +0.7 | Regular | |
| May 24, 2017 | 1–5 | Washington Nationals +4 | Washington Nationals +0.7 | Regular | |
| May 23, 2017 | 1–10 | Washington Nationals +9 | Washington Nationals +0.6 | Regular | |
| Aug 31, 2014 | 3–5 | Seattle Mariners +2 | Washington Nationals +0.2 | Regular | |
| Aug 30, 2014 | 3–1 | Washington Nationals +2 | Washington Nationals +0.2 | Regular | |
| Aug 29, 2014 | 8–3 | Washington Nationals +5 | Washington Nationals +0.2 | Regular | |
| Jun 23, 2011 | 0–1 | Washington Nationals +1 | Washington Nationals +0.0 | Regular | |
| Jun 22, 2011 | 1–2 | Washington Nationals +1 | Seattle Mariners +0.0 | Regular | |
| Jun 21, 2011 | 5–6 | Washington Nationals +1 | Seattle Mariners +0.0 | Regular | |
| Jun 15, 2008 | 6–2 | Washington Nationals +4 | Seattle Mariners +0.5 | Regular | |
| Jun 14, 2008 | 5–2 | Washington Nationals +3 | Seattle Mariners +0.5 | Regular | |
| Jun 13, 2008 | 7–6 | Washington Nationals +1 | Seattle Mariners +0.6 | Regular | |
| Jun 12, 2005 | 2–3 | Washington Nationals +1 | Washington Nationals +0.5 | Regular | |
| Jun 11, 2005 | 1–2 | Washington Nationals +1 | Washington Nationals +0.5 | Regular | |
| Jun 10, 2005 | 3–9 | Washington Nationals +6 | Washington Nationals +0.4 | Regular | |
| Jun 13, 2004 | 1–8 | Seattle Mariners +7 | Seattle Mariners +0.8 | Regular | |
| Jun 12, 2004 | 0–3 | Seattle Mariners +3 | Seattle Mariners +0.8 | Regular | |
| Jun 11, 2004 | 0–1 | Seattle Mariners +1 | Seattle Mariners +0.7 | Regular | |
| Jun 12, 2003 | 0–1 | Seattle Mariners +1 | Seattle Mariners +1.0 | Regular | |
| Jun 11, 2003 | 3–1 | Washington Nationals +2 | Seattle Mariners +1.1 | Regular | |
| Jun 10, 2003 | 7–3 | Washington Nationals +4 | Seattle Mariners +1.1 | Regular |