Richardson was added to the Seahawks' injury report after failing to practice Tuesday due to a groin injury, John Boyle of the Seahawks' official site reports.

Richardson was a full participant during Monday's walkthrough, but he may have picked up the injury in Sunday's loss to the Redskins. While the team is likely exercising caution with the 25-year-old pass catcher due to the short week, the situation will still need to be monitored going forward. Tyler Lockett and Tanner McEvoy would presumably see increased roles should Richardson ultimately be unable to go Thursday against the Cardinals.