The Saskatchewan Roughriders have traded quarterback Zach Collaros to the Toronto Argonauts.

The Riders picked up a conditional fourth round pick in the 2020 CFL draft.

Injured by concussion in the first game of the season, Collaros hasn't been on the field since then.

He was acquired by the Riders from Hamilton in January 2018 and was their starting quarterback last year and coming out of training camp this year.