The underdogs made a statement as they hosted the West Division leaders on their home turf as the Hamilton Tiger-Cats defeated the Winnipeg Blue Bombers 29-23.
After the Montreal Alouettes scored 17 unanswered points, the Argos completed a comeback to secure their best start in franchise history with a 23-20 win.
The Winnipeg Blue Bombers punched their ticket to the post-season and avenged their Labour Day Classic loss to the Saskatchewan Roughriders with a 51-6 win on Saturday at IG Field.