Megill entered camp further along than most Mets starters and was slated to throw three innings of live batting practice this week, Andrew Tredinnick of NorthJersey.com reports.
Mets manager Carlos Mendoza said Tuesday that Megill will be stretched out as a starting pitcher this spring, Tim Healey of Newsday reports.
The Mets and Megill avoided arbitration by agreeing to a one-year contract Thursday.
Megill is on the Mets' roster for the NLDS versus Philadelphia.
Megill is not on the Mets' roster for the National League Wild Card Series against the Brewers, Mike Puma of the New York Post reports.
Megill came away with a no-decision in the first game of Monday's doubleheader against Atlanta, giving up three runs on eight hits and two walks over 5.2 innings. He struck out eight.
Megill will start Game 1 of Monday's doubleheader with Atlanta, Andy Martino of SNY.tv reports.
Megill did not factor into the decision in Sunday's 2-1 win over the Phillies, allowing one run on four hits and two walks while striking out six over four innings.
Megill is expected to make his next start Tuesday against the Nationals at Citi Field, Tim Britton of The Athletic reports.
Manager Carlos Mendoza said Tuesday that Megill will get at least one more turn through the rotation, and the right-hander tentatively lines up to pitch Sunday against the Phillies, Tim Healey of Newsdayreports.