Moyer had signed a minor-league contract with the Jays in late June. He had pitched twice for Class AAA Las Vegas, posting an earned-run average of 8.18.
The veteran lefthander also was released this season by the Colorado Rockies and Baltimore Orioles.
Moyer has a 269-209 record with eight different teams in parts of 25 seasons in the major leagues.
He became the oldest pitcher ever to win a major league game while with the Rockies in April.
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