Atlanta manager Walt Weiss said Saturday that Lopez (knee) will likely go on the 15-day injured list, Chad Bishop of The Atlanta Journal-Constitution reports.
Lopez was scratched from his scheduled start Saturday against the Nationals due to left knee inflammation. He'll undergo an MRI to determine the severity of the knee injury, but Atlanta is already anticipating Lopez to be down for at least the next two weeks. JR Ritchie is expected to be called up from Triple-A Gwinnett to start in Sunday's series finale and could make a few turns through the rotation while Lopez is shelved.