Lopez was recalled from Triple-A Syracuse on Wednesday, Anthony DiComo of MLB.com reports.
Lopez was sent down by the Mets in late May, and he posted an 8.44 ERA and 2.44 WHIP in 5.1 innings over four appearances in Syracuse over the last few weeks. The right-hander should serve as a low-leverage option out of the Mets' bullpen now that he's back with the major-league club.