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 | Time | Att. | Record |
| --- | --- | --- | --- | --- | --- | --- |
| May 1 | Athletics | 7–5 | Halama (1–2) | 2:57 | 10,639 | 15–13 |
| May 2 | Mariners | 2–9 | Loaiza (5–1) | 2:39 | 13,355 | 15–14 |
| May 3 | Mariners | 2–12 | Stewart (1–2) | 3:16 | 25,837 | 15–15 |
| May 4 | Mariners | 1 – 5 (6) | Colón (2–3) | 1:21 | 15,413 | 15–16 |
| May 6 | @ Athletics | 0–6 | Buehrle (2–5) | 1:49 | 10,695 | 15–17 |
| May 7 | @ Athletics | 8–4 | Lilly (2–2) | 3:23 | 20,715 | 16–17 |
| May 8 | @ Athletics | 5–8 | Garland (2–3) | 3:00 | 12,329 | 16–18 |
| May 9 | @ Mariners | 3–6 | Wright (0–1) | 2:43 | 38,749 | 16–19 |
| May 10 | @ Mariners | 4–3 | Meche (4–2) | 2:34 | 43,123 | 17–19 |
| May 11 | @ Mariners | 2–7 | Buehrle (2–6) | 2:40 | 45,383 | 17–20 |
| May 13 | Orioles | 1–0 | Daal (2–5) | 2:27 | 14,397 | 18–20 |
| May 14 | Orioles | 5–1 | Helling (2–4) | 2:30 | 12,078 | 19–20 |
| May 15 | Orioles | 8–2 | Ponson (4–3) | 2:49 | 11,886 | 20–20 |
| May 16 | @ Twins | 3–18 | Buehrle (2–7) | 2:55 | 22,233 | 20–21 |
| May 17 | @ Twins | 1–3 | Garland (2–4) | 2:20 | 23,209 | 20–22 |
| May 18 | @ Twins | 2–3 | Gordon (2–3) | 2:48 | 25,055 | 20–23 |
| May 19 | Blue Jays | 2–12 | Wright (0–2) | 2:52 | 19,628 | 20–24 |
| May 20 | Blue Jays | 4–1 | Davis (1–3) | 3:01 | 12,857 | 21–24 |
| May 21 | Blue Jays | 6–5 | Politte (1–3) | 2:53 | 13,076 | 22–24 |
| May 23 | Tigers | 2–3 | Gordon (2–4) | 2:25 | 15,069 | 22–25 |
| May 24 | Tigers | 0–1 | Loaiza (7–2) | 2:35 | 27,535 | 22–26 |
| May 25 | Tigers | 8 – 5 (12) | Sparks (0–1) | 3:32 | 21,398 | 23–26 |
| May 26 | @ Blue Jays | 5–11 | Buehrle (2–8) | 3:16 | 19,009 | 23–27 |
| May 27 | @ Blue Jays | 1–5 | Colón (5–4) | 2:18 | 19,365 | 23–28 |
| May 28 | @ Blue Jays | 8–0 | Escobar (2–2) | 2:48 | 36,806 | 24–28 |
| May 29 | @ Blue Jays | 3–2 | Lidle (8–3) | 2:54 | 20,010 | 25–28 |
| May 30 | @ Indians | 3–7 | Wright (0–3) | 2:57 | 24,666 | 25–29 |
| May 31 | @ Indians | Postponed (rain), rescheduled for July 12 | Postponed (rain), rescheduled for July 12 | Postponed (rain), rescheduled for July 12 | Postponed (rain), rescheduled for July 12 | Postponed (rain), rescheduled for July 12 |
Question:
What date was the loss of ponson (4–3)?
Answer:
May 15