Steelers coach Mike Tomlin said last week the team was still weighing whether to move Johnson to IR. Pittsburgh officially made the move Monday, placing RB Anthony McFarland (knee) on IR, as well.
Johnson, 27, is in his fifth season with the Black and Yellow. The receiver logged three catches on six targets for 48 yards in Week 1. Over his career, Johnson has tallied 343 receptions for 3,694 yards and 20 touchdowns, en route to one Pro Bowl appearance.