The organization did not provide a timetable but confirmed he will not make the trip to Pittsburgh for tonight's game, forcing a quick reaction from management.
Blais is very familiar with the Montreal environment and will not require a long adjustment period.
It should be noted that Blais was signed by the Montreal Canadiens last summer, placed on waivers, claimed by the Toronto Maple Leafs, before returning to Montreal via waivers a few weeks ago.
His recall is intended to secure depth while awaiting clearer news on Evans' condition. The Habs thus avoid finding themselves short on options if the situation were to stretch over several games.
Samuel Blais, 29 years old, is a 6-foot-2, 206-pound forward who was a 6th-round pick in 2014.
He has totaled 74 points in 265 career games in the National Hockey League, including 3 points in 8 games this season with the Toronto Maple Leafs.
He has also recorded 9 points in 9 games with the Laval Rocket this year.