The Nationals recalled Lopez from Triple-A Syracuse on Sunday.
Lopez, following a brief return to the minors, will jump right back into the Nationals' rotation and start Sunday night against the Mets. His results have been up and down in five starts with the big club this season, as he has failed to get through the fifth inning three times but has also allowed just one earned run over seven innings on two other occasions. He is one of the Nationals' top prospects, but it remains to be seen if there will be room for him in the club's rotation beyond Thursday's outing.