Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Date | Opponent | Score | Loss | Attendance | Record |
| --- | --- | --- | --- | --- | --- |
| May 2 | Mets | 6 - 4 | Gentry (2-1) | 14702.0 | 17-7 |
| May 3 | Mets | 3 - 2 | Koonce (0-3) | 23228.0 | 18-7 |
| May 4 | Mets | 3 - 2 | Hands (3-3) | 0.0 | 18-8 |
| May 4 | Mets | 3 - 2 | Selma (2-3) | 40484.0 | 18-9 |
| May 6 | Dodgers | 7 - 1 | Sutton (3-3) | 7253.0 | 19-9 |
| May 7 | Dodgers | 4 - 2 12 | Jenkins (4-2) | 9747.0 | 19-10 |
| May 9 | Giants | 11 - 1 | Hands (3-4) | 5189.0 | 19-11 |
| May 11 | Giants | 8 - 0 | Sadecki (2-4) | 18572.0 | 20-11 |
| May 12 | Padres | 2 - 0 | Ross (1-2) | 3887.0 | 21-11 |
| May 13 | Padres | 19 - 0 | Kelley (2-3) | 5080.0 | 22-11 |
| May 14 | Padres | 3 - 2 | Podres (3-3) | 9622.0 | 23-11 |
| May 16 | @ Astros | 11 - 0 | Dierker (5-4) | 17053.0 | 24-11 |
| May 17 | @ Astros | 5 - 4 | Nottebart (1-1) | 18307.0 | 24-12 |
| May 18 | @ Astros | 6 - 5 | Regan (5-1) | 13126.0 | 24-13 |
| May 20 | @ Dodgers | 7 - 0 | Sutton (4-4) | 21266.0 | 25-13 |
| May 21 | @ Dodgers | 3 - 1 | Hands (3-5) | 16688.0 | 25-14 |
| May 22 | @ Dodgers | 3 - 0 | Singer (5-4) | 17974.0 | 26-14 |
| May 23 | @ Padres | 6 - 0 | Ross (1-4) | 7936.0 | 27-14 |
| May 24 | @ Padres | 7 - 5 | Kelley (2-4) | 4432.0 | 28-14 |
| May 25 | @ Padres | 10 - 2 | Nye (0-3) | 0.0 | 28-15 |
| May 25 | @ Padres | 1 - 0 | J. Niekro (1-3) | 13115.0 | 29-15 |
| May 27 | @ Giants | 5 - 4 | Regan (5-2) | 6608.0 | 29-16 |
| May 28 | @ Giants | 9 - 8 | Robertson (1-1) | 4447.0 | 30-16 |
| May 30 | Braves | 2 - 0 | Reed (5-3) | 36075.0 | 31-16 |
| May 31 | Braves | 3 - 2 | P. Niekro (7-4) | 29778.0 | 32-16 |
Question:
What is the date of the match with a 28-15 record?
Answer:
May 25