12:17 PM - Cameron Johnston (Pit) (knee) was placed on injured reserve Tuesday, Dale Lolley of the Steelers' official site reports.

3:41 PM - Cameron Johnston (Pit) suffered a season-ending knee injury in Sunday's 18-10 win over the Falcons, Ian Rapoport of NFL Network reports.

4:03 PM - Cameron Johnston (Pit) (leg) left the field on a cart and is likely out for the rest of Sunday's game against the Falcons, Alan Saunders of SteelersNow.com reports.