Heineman was called up from AHL Laval on Friday, according to Renaud Lavoie of TVA Sports.
Heineman was sent down to AHL Laval on Thursday.
Heineman was called up by Montreal on Wednesday.
Heineman was loaned to AHL Laval on Monday.
Heineman skated on the top line during the first day of training camp Thursday, Arpon Basu of The Athletic reports.
Heineman was assigned to AHL Laval on Monday.
Heineman (thumb) was activated from non-roster injured reserve and sent on loan to Leksands IF of the SHL, per CapFriendly.
Heineman will be sidelined for six weeks with a thumb injury.
Heineman's (upper body) injury is considered worse than day-to-day, Marc Antoine Godin of The Athletic reports Wednesday.
Heineman (upper body) was hurt Tuesday versus the Senators and is day-to-day, Eric Engels of Sportsnet.ca reports.