Current-feed record
+11wins for Nationals
65% Nationals · 35% Mariners
The split has held steady across the schedule change: 8-4 since 2023.
Seattle Mariners vs Washington Nationals All-Time Record
Interleague
Seattle Mariners
Washington Nationals
Nationals lead Mariners24to13since 2003
Retrosheet history through 2025, plus 3 final games from the current feed.
2026 season series: Nationals lead 2-1
Data updated 5 min read
At a glance
Current-feed analysis, 2002 to 2026
Seattle Mariners vs Washington Nationals insights
Recent form
9-11last 20
Nationals on a 2-game streak
Nationals won 10-1 on Jun 14, 2026
Where it matters
0Postseason games
No postseason meetings since 2002.
Schedule context
- Nationals built the series lead before the 2023 schedule change, taking 16 of 25 decided meetings (64%).
- Since the schedule balanced out they are 8-4, or 67% to Nationals.
Mariners vs Nationals interleague history by season
Seattle Mariners and Washington Nationals first met in 2003, so all 37 meetings across 12 seasons sit in the current feed. Interleague scheduling makes meeting frequency uneven, so the season table matters more than a raw average.
- Active seasons
- 12
- With at least one meeting since 2002
- Busiest season
- 2022
- 4 meetings
- Per active season
- 3.1
- Uneven interleague cadence
Win Percentage
13W
24W
SEA
WSH
35%65%
Seattle MarinersWashington Nationals
Recent Games
Last 10 Games
Jun 14
WSH 10-1 SEA
WSHJun 13
WSH 8-3 SEA
WSHJun 12
WSH 2-10 SEA
SEAMay 29
SEA 3-9 WSH
WSHMay 28
SEA 0-9 WSH
WSHMay 27
SEA 9-1 WSH
SEAMay 26
WSH 5-9 SEA
SEAMay 25
WSH 3-1 SEA
WSHMay 24
WSH 6-1 SEA
WSHJun 28
SEA 1-4 WSH
WSH| Date | Home | Away | Score | Result |
|---|---|---|---|---|
| Jun 14, 2026 | WSH | SEA | 10–1 | WSH |
| Jun 13, 2026 | WSH | SEA | 8–3 | WSH |
| Jun 12, 2026 | WSH | SEA | 2–10 | SEA |
| May 29, 2025 | SEA | WSH | 3–9 | WSH |
| May 28, 2025 | SEA | WSH | 0–9 | WSH |
| May 27, 2025 | SEA | WSH | 9–1 | SEA |
| May 26, 2024 | WSH | SEA | 5–9 | SEA |
| May 25, 2024 | WSH | SEA | 3–1 | WSH |
| May 24, 2024 | WSH | SEA | 6–1 | WSH |
| Jun 28, 2023 | SEA | WSH | 1–4 | WSH |
Last Meeting
Jun 14, 2026Final
WSH
10
HOME
SEA
1
AWAY
Nationalswon by9runs
Nationals' 2nd straight in this series·Game 37 since 2002
Streaks & Momentum
Current Streak
Washington Nationals: 2 consecutive wins
2
Avg. Margin of Victory
Games decided by 3.6 runs on average
3.6runs
Momentum (Last 10 vs Archive since 2002)
SEA-Neutral
Last 1030%
Archive since 200235.1%
WSH-Neutral
Last 1070%
Archive since 200264.9%
Last 10 Results
SEA / WSH
Record since 2002
Season Split & Biggest Wins
Regular season vs Postseason record, plus each team's largest margin of victory
Regular Season37 games
13
24
No postseason meetings appear since 2002.
Seattle Mariners Biggest Win
9–1+8 runs
May 27, 2025
Washington Nationals Biggest Win
10–1+9 runs
May 23, 2017
Decade Breakdown
Choose a decade to scope the current-feed page
Season by Season
| Season ↓ | SEA ↕ | WSH ↕ | Games ↕ |
|---|---|---|---|
| 2026 | 1 | 2 | 3 |
| 2025 | 1 | 2 | 3 |
| 2024 | 1 | 2 | 3 |
| 2023 | 1 | 2 | 3 |
| 2022 | 3 | 1 | 4 |
| 2017 | 1 | 2 | 3 |
| 2014 | 1 | 2 | 3 |
| 2011 | 0 | 3 | 3 |
| 2008 | 0 | 3 | 3 |
| 2005 | 0 | 3 | 3 |
| 2004 | 3 | 0 | 3 |
| 2003 | 1 | 2 | 3 |
All 12 seasons are shown in the table above.
Home / Away Split
AWAY
5-12
SEA
AWAY
12-8
WSH
Retrosheet archiveComplete through 2025
Seattle Mariners vs Washington Nationals all-time record, 2003 to 2025
Explore how this matchup changed by decade, where each lineup produced its runs, and the games that pushed the rivalry record book. This archive is a separate source window from the current-feed sections above, which start in 2002.
- Games
- 34
- Peak inning
- EX
- Record game
- 14 runs
Two source windows. Current-feed sections: 37 games from 2003 to 2026. History Lab: 34 Retrosheet games from 2003 to 2025. The first refreshes with current finals; Retrosheet's published archive currently ends in 2025.Small historical sample: 34 games. Era and inning rates describe these meetings, but should not be treated as a forecast.
Decade balance
Select an era to inspect pace, scoring and attendance.
SEAWSH
Scoring by inning
Runs per 100 batting innings, adjusted for unequal ninth and extra innings.
SEAWSH
55.9
150.0
5.9
247.1
29.4
317.6
58.8
464.7
35.3
529.4
38.2
620.6
26.5
747.1
32.4
850.0
22.2
976.9
33.3
EX333.3
- SEA after scoring first
- 60.0%
- WSH after scoring first
- 84.2%
- Lead-change games
- 38.2%
- Beyond nine innings
- 2
The games at the edges
Verified single-game records from the historical matchup log.
Highest total
14 runs
WSH 5, SEA 9
May 26, 2024
Biggest margin
9 runs
WSH 10, SEA 1
May 23, 2017
Longest game
11 innings
SEA 4, WSH 7
Jun 27, 2023
Largest crowd
43,339
SEA 8, WSH 1
Jun 13, 2004
Seattle Mariners largest comeback
2-run deficit
SEA 5, WSH 3
Aug 31, 2014
Washington Nationals largest comeback
5-run deficit
WSH 6, SEA 5
Jun 21, 2011
Full archive stat line
Counting stats across games with complete team totals.
MetricSEAWSH
Hits278284
Home runs3041
Walks8198
Strikeouts257229
Errors1418
Where the rivalry lived
- 0120games
Safeco Field
Seattle, WA
- 0211games
Nationals Park
Washington, DC
- 033games
Robert F. Kennedy Stadium
Washington, DC
Betting Context
Betting context since 2002
How this pairing has settled: run margins, totals and break-even prices derived from its historical record. These are final-score frequencies, not results against a closing line. We do not hold historical sportsbook prices for these games.
Small sample: 37 decided meetings, under the 50 we treat as the floor for a stable rate. Read the figures below as description, not a forecast. Interleague pairs meet in short bursts, so a single series can move any percentage here by several points.
One-run games
24.3%
Share of the 37 decided meetings settled by exactly one run.
Won by 2 or more
75.7%
A 2+ run margin crosses 1.5, but this is not a historical line result. Average gap: 3.6.
Average total
7.5runs
Final-score average without accounting for park, bullpen or weather.
Home side wins
54.1%
Share of decided meetings won by the listed home team.
Totals ladder
Where the combined score landed against the half-run lines a book normally posts. Half runs cannot push, so every meeting falls on one side.
| Line | Over | Under | Over rate |
|---|---|---|---|
| 7.5Closest to even | 19 | 18 | 51.4% |
| 8.5 | 17 | 20 | 45.9% |
| 9.5 | 15 | 22 | 40.5% |
Fair price from the base rate
The decimal price that corresponds exactly to each club's win share in this archive. It describes the record and does not estimate the next game.
Washington Nationals
24 W · 64.9%1.54
Seattle Mariners
13 W · 35.1%2.85
A base rate is not a forecast. Starting pitchers, lineups, injuries and venue all matter more to a single game than a multi-season head-to-head record.
Last 20 meetings vs full history
One-run games
5%vs 24.3% full archive
-19.3% in the last 20
Won by 2 or more
95%vs 75.7% full archive
+19.3% in the last 20
Average total
8.6 runsvs 7.5 runs full archive
+1.1 runs in the last 20
Seasons 2014 to 2026. The comparison shows whether the last 20 final scores differ from the longer archive, without assigning a cause or predicting what comes next.
View the break-even percentages in another odds format with the odds converter, or compare current prices for Nationals and Mariners in the oddsmatcher.
Questions about this record: Seattle Mariners vs Washington Nationals
When did the Seattle Mariners and Washington Nationals first play each other?
The Retrosheet archive's first recorded meeting for this pairing is Jun 10, 2003, when Washington Nationals won 7-3 away to Seattle Mariners. The archive covers 34 meetings from 2003 through 2025. The current feed starts in 2002 and is reported separately.
Methodology & Data Sources
Current MLB game logs come from the balldontlie API and cover the 2002 season onward. Scores and schedule anomalies are checked against the official MLB Stats API. Spring training is excluded, while results from earlier franchise identities are merged into the current club.
The all-time record and the History Lab use Retrosheet game logs through 2025, with inning lines, team totals, attendance, duration and ballpark fields when available. Final games after 2025 come from the current feed, and every section built on that feed alone is labeled as starting in 2002.
The betting context summarizes completed final scores only. It contains no sportsbook closing lines and summarizes only completed games. Report a possible error through our contact page with the matchup and game date.
Last updated Sources: balldontlie, MLB Stats API, Retrosheet
Seattle Mariners and Washington Nationals have met 37 times in this archive, which covers the 2003 season onward.