Oviedo will start Saturday's game against the Reds, Jeff Jones of the Belleville News-Democrat reports.
Oviedo was called up Tuesday, and he'll get the chance to work out of the rotation with Jack Flaherty (oblique) on the injured list. In five appearances (four starts) for the Cardinals this year, the righty has posted a 5.40 ERA and 1.60 WHIP in 20 innings.