Records since the 1969 season.
| Matchup | Record | Win % | Vs Expected | Games |
|---|---|---|---|---|
| Nationals Phillies | 463-511-7 | 47.5% | -13.0 | 920 |
| Nationals Mets | 480-489-6 | 49.5% | +8.5 | 912 |
| Nationals Braves | 391-441-2 | 47.0% | +2.7 | 798 |
| Nationals Pirates | 322-348 | 48.1% | -5.3 | 636 |
| Nationals Cardinals | 321-349-4 | 47.9% | +0.3 | 634 |
| Nationals Cubs | 339-321-4 | 51.4% | +7.7 | 626 |
| Nationals Marlins | 265-277-7 | 48.9% | -18.4 | 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 | 218-255 | 46.1% | -9.8 | 462 |
| Nationals Rockies | 108-132-4 | 45.0% | -17.8 | 230 |
| Nationals Brewers | 88-101 | 46.6% | -3.0 | 181 |
| Nationals Diamondbacks | 104-84 | 55.3% | +12.5 | 181 |
| Nationals Orioles | 59-66 | 47.2% | -3.2 | 120 |
| Nationals Blue Jays | 38-49 | 43.7% | -2.8 | 84 |
| Nationals Yankees | 21-29 | 42.0% | +0.8 | 48 |
| Nationals Rays | 22-27 | 44.9% | -0.8 | 47 |
| Nationals Red Sox | 18-30 | 37.5% | -2.8 | 46 |
| Nationals Mariners | 24-13 | 64.9% | +7.5 | 34 |
| Nationals Angels | 13-18-3 | 41.9% | -3.0 | 32 |
| Nationals White Sox | 20-14 | 58.8% | +3.0 | 31 |
| Nationals Tigers | 16-15-3 | 51.6% | -0.6 | 31 |
| Nationals Rangers | 13-14-3 | 48.1% | -1.4 | 28 |
| Nationals Guardians | 16-15 | 51.6% | +1.9 | 28 |
| Nationals Twins | 16-14 | 53.3% | +2.0 | 27 |
| Nationals Royals | 18-12 | 60.0% | +2.8 | 27 |
| Nationals Athletics | 14-13 | 51.9% | +0.8 | 25 |
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