Ponce de Leon cleared waivers and was outrighted to Triple-A Memphis on Wednesday.
Ponce de Leon was designated for assignment Monday, but he'll remain in the organization after he went unclaimed on waivers. The right-hander posted a career-worst 6.21 ERA in 33.1 innings with the major-league club this year but has tossed nine scoreless innings across five starts in Memphis this year.