Kirby Lee / USA TODAY Sports

The Green Bay Packers have placed cornerback Sam Shields on injured reserve as he continues to recover from a concussion sustained in Week 1, the team announced Tuesday.

Shields would be eligible for activation after eight weeks on IR. He explained in an Instagram post that he’s making “great” progress and hopes to get back on the field this season, but an official timetable for his return presumably won’t be made clear until closer to that date.

The latest injury marks the fifth concussion of Shields’ career. As NFL Network’s Mike Garafolo reports, doctors and the Packers organization are intent on ensuring that Shields is healthy before clearing him to play.

Indeed, returning to the lineup down the stretch would provide a significant addition to a Green Bay defensive backfield already leading the way to an 11th-ranked standing against the pass.

Damarious Randall, Quinten Rollins, and Ladarius Gunter will continue to serve as the top three cornerbacks until Shields is able to make his healthy return.