Overview

• Arnold aggravated the same shoulder he hurt in Week 4 and was carted off during Sunday's win in Cincinnati before being ruled out of the game.
• Campbell said Monday the team does not know if the injury will end Arnold's season.
• Detroit's cornerback depth is thin with D.J. Reed on injured reserve, Khalil Dorsey expected to miss time, and Ennis Rakestraw already out for the year.
• Roles are shifting to Amik Robertson on the boundary with Rock Ya-Sin and Avonte Maddox in the mix, and Brian Branch could handle more slot snaps.
• The Lions added Tre Flowers and Nick Whiteside to the practice squad, and reporting indicates they may pursue external cornerback help given available cap space.