Martinez and the Reds won't face Atlanta on Tuesday because the game was postponed due to inclement weather.
Tuesday's game will be made up during a doubleheader Wednesday, and Martinez will start the second game of the twin bill, per Mark Sheldon of MLB.com. The 33-year-old holds a 3.88 ERA and 1.13 WHIP through 72 innings on the season, though he hasn't started a game since May.