Martinez will be called up from Triple-A Las Vegas to start Sunday's game against the Giants, Martin Gallegos of MLB.com reports.
Martinez had mixed results over four starts with the big club earlier in the season, and he will get another chance to show what he can do in the final game of the Bay Bridge Series. He threw at least 91 pitches in his last three starts with Triple-A, so don't expect him to be on a pitch count.