Ponce de Leon (shoulder) will throw a side session Saturday, Jeff Jones of the Belleville News-Democrat reports.
Ponce de Leon recently made three rehab starts at Triple-A Memphis, and he built up to three innings during his most recent appearance. Based on how he feels after Saturday's throwing session, the Cardinals will determine whether the right-hander will resume his rehab assignment or throw an additional live BP prior to rejoining the major-league club. However, Ponce de Leon is expected to remain on the injured list until at least next weekend.