Prior to that, deGrom had been dealing with a strained right lat muscle, which he sustained in his lone start on April 8. The right-hander threw a successful bullpen session in Port. St. Lucie, Fla., on Friday morning and will make his second start of the season Sunday.
In his lone appearance, deGrom lasted six innings in a winning effort against the Phillies, allowing five hits and one run while striking out six.
Montero was called up from Triple-A on April 13 and appeared in two games. The reliever pitched a combined 2 1/3 innings, while giving up three runs on five hits.
Connor Smolensky is a contributor to MLB.com based in Atlanta. This story was not subject to the approval of Major League Baseball or its clubs.