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 1 | Red Sox | 6–5 | Drese (2–3) | 49,342 | 12–14 |
| May 2 | @ Athletics | 3–2 | Harden | 10,144 | 13–14 |
| May 3 | @ Athletics | 6–1 | Saarloos | 10,427 | 14–14 |
| May 4 | @ Athletics | 16–7 | Haren | 15,654 | 15–14 |
| May 6 | Indians | 8–6 | Astacio (1–4) | 30,742 | 15–15 |
| May 7 | Indians | 6–1 | Elarton | 36,311 | 16–15 |
| May 8 | Indians | 7–2 | Westbrook | 23,203 | 17–15 |
| May 9 | Tigers | 2–0 | Cordero (0–1) | 24,122 | 17–16 |
| May 10 | Tigers | 5–4 | Johnson | 24,766 | 18–16 |
| May 11 | Tigers | 6–5 | Mahay (0–1) | 28,689 | 18–17 |
| May 13 | @ Twins | 9–6 | Nathan | 24,524 | 19–17 |
| May 14 | @ Twins | 5–0 | Silva | 28,624 | 20–17 |
| May 15 | @ Twins | 5–2 | Mahay (0–2) | 27,891 | 20–18 |
| May 16 | @ White Sox | 7–6 | Marte | 26,889 | 21–18 |
| May 17 | @ White Sox | 5–2 | Astacio (1–5) | 18,333 | 21–19 |
| May 18 | @ White Sox | 7–0 | Drese (3–4) | 16,255 | 21–20 |
| May 20 | Astros | 7–3 | Backe | 38,109 | 22–20 |
| May 21 | Astros | 18–3 | Astacio | 35,781 | 23–20 |
| May 22 | Astros | 2–0 | Oswalt | 40,583 | 24–20 |
| May 24 | Royals | 4–3 | Hernández | 27,449 | 25–20 |
| May 25 | Royals | 7–3 | Greinke | 23,755 | 26–20 |
| May 26 | Royals | 8–1 | Lima | 25,022 | 27–20 |
| May 27 | White Sox | 6–2 | McCarthy | 31,149 | 28–20 |
| May 28 | Postponed | Postponed | Postponed | Postponed | 29–20 |
| May 29 | White Sox | 12–4 | Garland | 36,265 | 29–20 |
| May 31 | @ Tigers | 8–2 | Maroth | 16,931 | 30–20 |
Question:
Who was the opponent at the game when the record was 15–15?
Answer:
Indians