The Chicago Bears placed star cornerback Jaylon Johnson on injured reserve on Saturday after the two-time Pro Bowler indicated during the week he might have season-ending groin surgery. What we know:Johnson left a blowout loss at Detroit last week after he was hurt breaking up a pass. Johnson missed training camp, the preseason and the season opener because of a groin injury. Johnson previously injured his groin in what he recently described as a "freak accident" while working with some receivers in Las Vegas over the summer. The Bears (0-2) also placed offensive lineman Kiran Amegadjie (elbow) on IR, signed defensive lineman Tanoh Kpassagnon and promoted defensive back Dallis Flowers and linebacker Carl Jones Jr. from the practice squad.