Hamilton has released receiver Ricky Collins after acquiring him in an August trade with Saskatchewan.
He did not appear in a game with the Ticats.
The Tiger-Cats sent defensive end Mike McAdoo and a sixth-round pick in the 2018 CFL draft to the Riders in exchange for Collins and a seventh rounder. McAdoo was released by Saskatchewan on Aug. 29.
The 25-year-old played 14 regular season games in 2016 with 13 starts, registering 48 receptions for 720 yards and two touchdowns. He has played in just one game this season, that was with Saskatchewan, suffering a shoulder injury in the season-opener against the Montreal Alouettes.