Gsellman is scheduled to start one of the doubleheader games Saturday against the Braves, James Wagner of The New York Times reports.
The Saturday start could be Gsellman's last in the majors for a while, as the Mets are set to welcome back Steven Matz (elbow) and Seth Lugo (elbow) from the disabled list by next weekend, both of whom are expected to retain rotation spots ahead of the 23-year-old right-hander. While Gsellman has pitched well his last three times out against the Padres, Brewers and Pirates, he's still carrying a 5.53 ERA and 1.54 WHIP over 57 innings this season, which may be enough to convince manager Terry Collins to give Lugo a look as the fifth starter.