Denarius Moore hasn't had a lot of time to work with Carson Palmer this summer because of injuries.

Moore has been sidelined since early August with an injured right hamstring.

"I'm very concerned," he said. "As far as getting timing down with the quarterback, that's very important. And actually being out there and repping each play, getting each concept down. It's just mental errors, too, that you have to be aware of."

In his rookie season, Moore had 33 receptions for 618 yards and five touchdowns.