What happened: Atlanta will place cornerback A.J. Terrell Jr. on injured reserve with a groin injury. The designation sidelines him at least four games, ruling him out Thursday night against Green Bay.

Why it matters: Terrell is Atlanta's top boundary corner, backed by Ulbrich as the NFL's top boundary corner. His absence thins the secondary on a short week with Michael Penix set to start Thursday.

What to watch: Atlanta hosts Green Bay on Thursday night. Zach Harrison joins the active roster from the practice squad for defensive depth.