Montero tossed three perfect innings Thursday, striking out three, in an 8-3 loss to the Nationals.
It was a nice return to the majors for the right-hander, who gave up five runs in 6.2 innings over his last three appearances prior to his demotion at the end of May. Montero carries an ugly 7.15 ERA and 2.21 WHIP with the Mets but could still be in line for a spot start early next week, although at the moment Tyler Pill seems to be the favorite for the assignment.