The Packers are placing cornerback Sam Shields on injured reserve, according to Mike Garafolo of NFL.com (via Twitter). Shields himself seems to have confirmed the news via social media as well. 
Shields recently suffered a concussion and he has not rebounded from it as doctors hoped he would. By placing him on IR, the Packers are sidelining the cornerback for a minimum of two months. If he recovers in the next eight weeks and the Packers do not elect to bring a different player back from IR, then he could potentially be activated late in the season.
Shields suffered a concussion during Green Bay’s Week 1 victory against Jacksonville, which came less than nine months after his previous concussion in December 2015. Just 28, Shields has now suffered four concussions in the past six seasons. Considered to be one of the better cornerbacks in the NFL when healthy, he signed a four-year, $39MM deal with Green Bay prior to the 2014 season.
Shields described last year’s concussion as particularly scary because he does not remember anything that happened.
“All I remember is going after the tackle and my head hitting the ground. And that was it. I blanked out. I try to keep my head from getting in there, but it’s kind of hard. It’s a physical sport,” Shields said.
Given Shields’ history with head trauma, the Packers aren’t taking any chances with him. Packers coach Mike McCarthy indicated yesterday that the team would consider adding a cornerback, though it’s not a certainty since the team does not want to leave itself thin elsewhere.