Johnstone is an undrafted 27-year-old forward who has spent parts of the last three seasons in the AHL, between the Toronto Marlies and Wilkes-Barre/Scranton Penguins, tallying 27 points (11G / 16A) in 94 games. His call-up coincides with Joona Koppanen and Alex Nylander being reassigned to Wilkes-Barre/Scranton.
