2005 Washington Nationals season Game log May

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| May 23 | @ Cincinnati Reds | 3-5 | Loaiza (1-3) | 17630 | 24-21 |
| May 24 | @ Cincinnati Reds | 3-4 (15) | Ayala (2-3) | 36539 | 24-22 |
| May 25 | @ Cincinnati Reds | 3-12 | Vargass (0-3) | 20497 | 24-23 |
| May 27 | @ St. Louis Cardinals | 3-6 | Armas (1-3) | 47383 | 24-24 |
| May 28 | @ St. Louis Cardinals | 1-3 | Loaiza (1-4) | 49123 | 24-25 |
| May 29 | @ St. Louis Cardinals | 3-2 | Carpenter (7-3) | 47012 | 25-25 |
| May 30 | Atlanta Braves | 3-2 | Davies (2-1) | 39705 | 26-25 |
| May 31 | Atlanta Braves | 5-4 | Colón (0-2) | 29512 | 27-25 |