What happened: Clemons, a defensive end, moves to injured reserve after being questionable to return with a toe injury Sept. 21. Castle exits the practice squad at running back, opening one developmental spot.

Why it matters: Losing edge depth tests the defensive line rotation early in the regular season. Churn at the bottom of the running back room preserves flexibility for an elevation or outside addition.

What to watch: Watch for a corresponding edge addition and the next practice-squad running back signing.