Most likely not, and there should be no panic among the hierarchy considering how long, and grueling the CFL year is.
A little history note, aside from their 2009 Grey Cup triumph, McMahon Stadium has been a house of horrors for the Alouettes. Under Marc Trestman, the team has compiled a record of 1-4 playing in Calgary, and have been outscored 190-132.
The bad news is the Alouettes lost, the good news, everyone else in the division did not win either. Montreal will have four division matches before their bye week in the middle August. So they could set themselves apart if they're able to win these critical games and be in decent shape heading into the second half of the season.