09/04/2013 05:22 EDT | Updated 11/04/2013 05:12 EST

Alouettes place veteran quarterback Calvillo on nine-game injured list

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.

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, however the move doesn't mean Calvillo can't return to the lineup before the start of the CFL playoffs as clubs can pull two players off the nine-game injured list each season.