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Arnaud has missed the last two games with a bruised throwing hand. But Arnaud says he's able to grip the ball better now and get the velocity he needs on his passes.
Iowa State split the two games Arnaud missed, winning at Nebraska and losing at Texas A&M.
Center Reggie Stephens also is expected back after missing the Texas A&M game following an appendectomy.
Coach Paul Rhoads says running back Alexander Robinson, who has been slowed by a groin injury, is the healthiest he's been since September.