Ortiz will start Wednesday against the Cardinals, Jason Mackey of the Pittsburgh Post-Gazettereports.
Ortiz has split the season evenly between Triple-A Indianapolis and the majors, although he hasn't experienced much success at either level. Across 53.2 frames in Pittsburgh, he maintained only a 34:26 K: BB while serving up a 1.8 HR/9. On a positive note, he's worked four or five frames in each of his last five appearances in the minors, so he could work deep enough into the game to qualify for a win if his start goes well.