Lopez will be utilized as a reliever going forward while working on some mechanical issues, Mark Bowman of MLB.com reports.
The right-hander's 3.74 ERA through five starts this year looks solid, but his 1.43 WHIP and 20:11 K:BB tell a different story. Atlanta will soon be getting back Spencer Strider (oblique) from the injured list, while rookie JR Ritchie will also get a longer look in the rotation.