The Seahawks already knew they'd be without tackle Brandon Shell on Sunday vs. the Cardinals after ruling him out on Friday due to a shoulder injury, but Saturday's move officially placed him on Injured Reserve. The additional spot was used to sign tight end Tyler Mabry to the active roster. Mabry has spent most of the 2021 season on Seattle's practice squad, though he has appeared in a total of five games, playing 20 snaps on offense and 65 on special teams.
Additionally, guard Kyle Fuller was added to the Reserve/COVID-19 list, joining four other members of the 53-man roster: defensive end Alton Robinson, defensive tackle Al Woods, safety Ryan Neal, and cornerback Gavin Heslop. Practice squad defensive tackle Myles Adams is also on the COVID-19 list. The Seahawks activated three practice squad players as COVID-19 replacements: wide receiver Cody Thompson, and defensive backs Michael Jackson and Josh Jones. Wide receiver Aaron Fuller has also been activated from the practice squad as a standard elevation.