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 |
| --- | --- | --- | --- | --- | --- |
| September 1 | @ Royals | 5–4 | Howell | 12735.0 | 65–69 |
| September 2 | @ Royals | 8–7 | MacDougal | 14425.0 | 66–69 |
| September 3 | @ Royals | 5–3 | Carrasco | 18932.0 | 67–69 |
| September 4 | @ Royals | 17–8 | Volquez (0–2) | 15512.0 | 67–70 |
| September 5 | @ Twins | 7–0 | Silva | 15627.0 | 68–70 |
| September 6 | @ Twins | 10–7 | Nathan | 12564.0 | 69–70 |
| September 7 | @ Twins | 8–6 | Brocail (5–3) | 13034.0 | 69–71 |
| September 9 | Athletics | 9–8 | Domínguez (3–4) | 26468.0 | 69–72 |
| September 10 | Athletics | 5–4 | Loe (8–5) | 41058.0 | 69–73 |
| September 11 | Athletics | 7–4 | Kennedy | 19913.0 | 70–73 |
| September 12 | Orioles | 4–2 | Volquez (0–3) | 20418.0 | 70–74 |
| September 13 | Orioles | 4–3 | Wilson (1–7) | 21167.0 | 70–75 |
| September 14 | Orioles | 7–6 | Grimsley | 18077.0 | 71–75 |
| September 15 | Mariners | 4–3 | Harris | 23679.0 | 72–75 |
| September 16 | Mariners | 5–3 | Hernández | 25567.0 | 73–75 |
| September 17 | Mariners | 7–6 | Guardado | 41983.0 | 74–75 |
| September 18 | Mariners | 8–6 | Franklin | 26532.0 | 75–75 |
| September 20 | @ Angels | 2–1 | Domínguez (3–5) | 36170.0 | 75–76 |
| September 21 | @ Angels | 6–5 | Feldman (0–1) | 37776.0 | 75–77 |
| September 22 | @ Angels | 7–4 | Volquez (0–4) | 36588.0 | 75–78 |
| September 23 | @ Athletics | 3–1 | Haren | 33402.0 | 76–78 |
| September 24 | @ Athletics | 7–6 | Wasdin (2–2) | 26704.0 | 76–79 |
| September 25 | @ Athletics | 6–2 | Saarloos | 27709.0 | 77–79 |
| September 27 | @ Mariners | 3–2 | Mateo | 22739.0 | 78–79 |
| September 28 | @ Mariners | 7–3 | Piñeiro | 20723.0 | 79–79 |
| September 29 | @ Mariners | 4–3 | Rogers (14–8) | 19481.0 | 79–80 |
| September 30 | Angels | 7–1 | Dickey (1–2) | 38187.0 | 79–81 |
| October 1 | Angels | 7–6 | Domínguez (4–6) | 48174.0 | 79–82 |
| October 2 | Angels | 7–4 | Loe (9–6) | 38334.0 | 79–83 |
Question:
What was the lowest attendance recorded at a game on September 28?
Answer:
20723.0