user: ### NOW ANSWER:
Question: Who was the opponent that led to a 10-13 record?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Record']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['April 4', '@ Pirates', '9 - 2', 'Pérez (0-1)', '1-0']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Record" = '10-13';