The Roughriders line up continues to be a revolving door. 

Head coach Corey Chamblin has not been afraid to make changes to the line up every week, even after some early season wins. Now the team is making some permanent changes to the roster.

Defensive back Milt Collins was officially signed by the club on Thursday. Collins has spent the last five years in the CFL, after originally signing with the Calgary Stampeders in 2008. He would stay in Calgary until last season, when he was traded to the Hamilton Tiger-Cats. He joins the Riders with 87 career tackles, eight intercepions and three quarterback sacks.

Because of some previous additions, the Riders had to make some room on the roster for Collins. So with that in mind, the team has also released import defensive back Nick Graham and import offensive lineman Chris Patrick.

Graham joined the Riders in 2010 after spending some time with the NFL's Philadelphia Eagles and Indianapolis Colts. Graham however quickly fell out of favour with the coaching staff, being taken out of the line for another former Ti-Cat, Woodny Turenne. Only returning to the field once the secondary ran into some injury problems.

Patrick being let loose might be a little more surprising, considering the Riders traded for him just this past May, but he had recently been replaced by non-import offensive lineman Patrick Neufeld.