American pass catcher DeVier Posey has been placed on the six-game injured list.
The 27-year-old currently sits fourth in the CFL with 280 receiving yards and tied for third with two touchdown receptions.
Posey played in four games for Toronto last season and made 13 grabs for 161 yards.
He was drafted in the third round, 68th overall by the Houston in the 2012 NFL draft. In 26 games with the Texans Posey made 22 receptions for 272 yards. He bounced from the Jets to the Broncos before signing with the Argos in September 2016.