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 | Winning Team | Score | Winning Pitcher | Losing Pitcher | Attendance | Location |
| --- | --- | --- | --- | --- | --- | --- |
| May 20 | Texas | 7–3 | Kenny Rogers | Brandon Backe | 38109.0 | Arlington |
| May 21 | Texas | 18–3 | Chris Young | Ezequiel Astacio | 35781.0 | Arlington |
| May 22 | Texas | 2–0 | Chan Ho Park | Roy Oswalt | 40583.0 | Arlington |
| June 24 | Houston | 5–2 | Roy Oswalt | Ricardo Rodriguez | 36199.0 | Houston |
| June 25 | Texas | 6–5 | Chris Young | Brandon Backe | 41868.0 | Houston |
Question:
Who was the losing pitcher when 40583 attended?
Answer:
Roy Oswalt