The Saskatchewan Roughriders will place quarterback Zach Collaros on the six-game injured list after suffering a head injury in the team's Week 2 loss to the Ottawa Redblacks.

Roughriders head coach Chris Jones told reporters Brandon Bridge, who relieved Collaros last Thursday after his injury, will start Saturday against the Montreal Alouettes.

Collaros was injured in the second quarter last Thursday against the Reblacks on a hit from Avery Ellis. The 29-year-old left the game to undergo concussion protocol and did not return.