Megill will start Monday's game in Toronto, Anthony DiComo of MLB.com reports.
Paul Blackburn (hand) had been slated to come off the 15-day injured list to start Monday, but the Mets have elected to give the ball to Megill instead. Megill will be pitching on normal rest after yielding three runs over four innings in a start last week against the Red Sox. He could be moved to the bullpen following Monday's outing.