MONTREAL -- The Montreal Alouettes have placed veteran quarterback Anthony Calvillo on the nine-game injured list.
Calvillo suffered a concussion in a 24-21 loss to the Saskatchewan Roughriders on Aug. 17 and hasn't practised or played since.
He was placed on injured list before Tuesday's game so he is due to come off before the final regular season game.
However, Alouettes head coach Jim Popp told Calvillo that if his symptoms clear up over the next month, the team will pull him off the injured list early.
Montreal is 2-0 in his absence, thanks to rookie Tanner Marsh.
Marsh came off the bench to lead Montreal to a 39-38 win over the B.C. Lions on Aug. 22.
The 23-year-old Texan made a successful debut as a CFL starter Tuesday night, completing 18-of-27 passes for 309 yards and a TD in a 20-9 road win over the Toronto Argonauts.
Marsh is expected to make the start Sunday when Montreal (4-5) hosts the Argos (5-4).
Calvillo, 41, is in his 20th CFL season and 16th with the Alouettes.
Montreal has nine regular-season games remaining but clubs can pull two players off the nine-game injured list each season.