Records since the 1969 season.
| Matchup | Record | Win % | Vs Expected | Games |
|---|---|---|---|---|
| Nationals Phillies | 462-507-12 | 47.7% | -14.0 | 920 |
| Nationals Mets | 480-489-6 | 49.5% | +8.6 | 912 |
| Nationals Braves | 391-437-6 | 47.2% | +2.8 | 798 |
| Nationals Pirates | 321-346-3 | 48.1% | -6.3 | 636 |
| Nationals Cardinals | 321-349-4 | 47.9% | +0.3 | 634 |
| Nationals Cubs | 339-321-4 | 51.4% | +7.6 | 626 |
| Nationals Marlins | 265-277-7 | 48.9% | -18.5 | 528 |
| Nationals Dodgers | 218-315-3 | 40.9% | -26.1 | 519 |
| Nationals Giants | 263-272 | 49.2% | +4.2 | 510 |
| Nationals Reds | 251-271-3 | 48.1% | +2.4 | 509 |
| Nationals Padres | 271-251-3 | 51.9% | +0.2 | 501 |
| Nationals Astros | 216-254-3 | 46.0% | -11.8 | 462 |
| Nationals Rockies | 106-131-7 | 44.7% | -19.9 | 230 |
| Nationals Brewers | 88-101 | 46.6% | -3.0 | 181 |
| Nationals Diamondbacks | 102-83-3 | 55.1% | +10.5 | 181 |
| Nationals Orioles | 57-65-3 | 46.7% | -5.2 | 120 |
| Nationals Blue Jays | 37-47-3 | 44.0% | -3.7 | 84 |
| Nationals Yankees | 21-26-3 | 44.7% | +0.9 | 48 |
| Nationals Rays | 21-25-3 | 45.7% | -1.8 | 47 |
| Nationals Red Sox | 16-29-3 | 35.6% | -4.8 | 46 |
| Nationals Mariners | 22-13-2 | 62.9% | +5.5 | 34 |
| Nationals Angels | 13-18-3 | 41.9% | -2.9 | 32 |
| Nationals White Sox | 20-14 | 58.8% | +3.0 | 31 |
| Nationals Tigers | 16-15-3 | 51.6% | -0.7 | 31 |
| Nationals Guardians | 16-15 | 51.6% | +1.9 | 28 |
| Nationals Rangers | 13-14-3 | 48.1% | -1.4 | 28 |
| Nationals Twins | 16-14 | 53.3% | +2.0 | 27 |
| Nationals Royals | 16-11-3 | 59.3% | +0.8 | 27 |
| Nationals Athletics | 12-12-3 | 50.0% | -1.1 | 25 |
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