O'Neill was recalled from Triple-A Memphis on Saturday and will start in left field against the Padres, Derrick Goold of the St. Louis Post-Dispatch reports.
EDGE Analysis
O'Neill joins the Cardinals in San Diego and will immediately slot into the starting lineup with Marcell Ozuna (fingers) landing on the injured list. The 24-year-old figures to see a decent amount of playing time for the near future since Ozuna has no official timeline for his return.