Wainwright's (elbow) scheduled rehab start for Triple-A Memphis has been pushed back a day until Monday, Derrick Goold of the St. Louis Post-Dispatch reports.
The change has nothing to do with a setback on Wainwright's part, but rather, it's an attempt to keep Daniel Poncedeleon on track to return to the major-league club for a Sept. 1 start. Wainwright is still slated to stretch out to four innings as he also prepares for a return to the Cardinals shortly after rosters expand Saturday. St. Louis has yet to clarify how Waiwright will be used once activated, but with back-end starters John Gant and Austin Gomber performing capably and Michael Wacha (oblique) also on track to return from the disabled list in early September, the longtime staff ace could be ticketed for a bullpen role.