Martinez will start Game 1 of Wednesday's doubleheader against the Padres after Tuesday's game was postponed, the St. Louis Post-Dispatch's Derrick Goold reports.
The electric righty will get an extra day's rest before making his 18th start of the season Wednesday in a favorable matchup against the Padres, who will be starting Colin Rea in Game 1. Jaime Garcia, Wednesday's originally scheduled starter, will take the ball for Game 2 of the doubleheader.