With Cardinals tight end Troy Niklas (ankle) on injured reserve, the team will turn to tight end Darren Fells to fill his role, reports Fox Sports. "Darren will take Troy's job, and he's more than capable," coach Bruce Arians said.
"He's shown flashes of being a very dominant blocker. This is a great opportunity for him, and we need him to step up."
Arizona visits Seattle on Sunday.