The Saskatchewan Roughriders added to their Canadian depth on Wednesday.

The Roughriders signed three nationals, defensive backs Michael Carter and Kristopher Robertson, and linebacker Kyle Jones.

Carter spent the past three seasons with the Montreal Alouettes but has also played with the Hamilton Tiger-Cats.

The 28-year-old Carter has 15 tackles in his four years in the league.

Robertson joins the Riders after Saskatchewan acquired his rights from the Winnipeg Blue Bombers in December's negotiation list draft.

And Jones joins Saskatchewan for his sixth CFL season after spending last year in Winnipeg.