Lopez will now start Thursday's game against the Diamondbacks, Craig Mish of SportsGrid.com reports.
Lopez isn't dealing with any injury, but he'll now start Thursday's series finale against Arizona while Nick Neidert starts a bullpen game Wednesday. Lopez has posted quality starts in each of his last three outings and has generated a 0.47 ERA and 1.00 WHIP in 19 innings during that time.