Source: Oswalt trade looking unlikely
But Oswalt told FOXSports.com during spring training that his career would be "done" after next season.
"This year and next year will probably be it," he said then. "I still love the game. ... But when I get finished with my contract, if I'm not pitching at the level I'm pitching at now, then I'm not going to come back and hurt the team."
Oswalt is 6-12 with a 3.42 ERA in 20 starts this season. He surrendered six earned runs over five innings in his last outing.