TORONTO -- A revamped Toronto Argonauts defence will feature four new starters when the club faces the Saskatchewan Roughriders on Saturday.

Cornerback Vincent Agnew, linebacker Antwaun Molden and defensive tackle Marcus Thomas will all start versus the Riders after missing Toronto's season-opening 45-21 road loss to Winnipeg last week.

Cornerback Matt Ware and linebacker Jamie Robinson, who both played against Winnipeg, will miss Saturday's game on the injured list.

As well, Jeremaine Gabriel steps in at safety with incumbent Matt Black also going on the injured list.

Running back Jeremiah Johnson will miss the contest on the injured list, with Anthony Woodson coming off the practice roster to replace him.

The defending champion Riders won their season opener, downing Hamilton 31-10 in a Grey Cup rematch Sunday night.