Benjamin was limited at Wednesday's practice due to a groin injury, Josh Weinfuss of ESPN.com reports.
The hits keep coming for a Cardinals offense that has had numerous starters miss game action so far this season. In the backfield, Chase Edmonds is on injured reserve due to a high-ankle sprain, while Jonathan Ward hasn't practiced since sustaining a concussion Week 8 against the Packers. Benjamin has stepped in for Edmonds in both of Arizona's past two contests, working as a complement to top option James Conner and compiling 15 carries for 61 yards and one touchdown in the process. Assuming Benjamin gets past the current health concern, he'll back up Conner again Sunday in Seattle.