Lopez will start Friday's game against the Giants, Mark Bowman of MLB.com reports.
Lopez began the season in Atlanta's rotation but was moved to the bullpen in April after posting a 3.74 ERA and 1.43 WHIP alongside a 20:11 K:BB over 21.2 innings across five starts. He'll now get another chance to work as a starter following JR Ritchie's demotion to Triple-A, though Lopez's first opportunity will come against a Giants offense that's posted a .799 OPS since the beginning of June. The 32-year-old threw just 58 pitches across three innings during his most recent appearance Sunday, and he said Wednesday that he'll likely have a similar workload during his upcoming start, per Bowman.