Broncos wide receiver Eric Decker was knocked out of Sunday's playoff win over the Steelers after being hit in the left knee by Pittsburgh linebacker James Harrison. Decker, the team's leading receiver, was helped off the field and went straight to the locker room. The Denver Post reported Sunday night that Decker was scheduled to undergo an MRI on Monday. The second-year receiver hauled in a pass over the middle, but was immediately tackled by Harrison, who went low to bring Decker down on a play first ruled a catch and then overturned on replay.