In other running back injury news, C.J. Prosise was back on the field after missing last week's game and two days of practice this week with a hip-flexor injury. Mike Davis, however, was not on the field Wednesday because of a toe injury.

"He did all the early part of practice," Carroll said of Prosise. "He's on the verge on being ready to play this week now."

On Davis, Carroll said, "He's got a sore toe that just popped up today. He didn't even know he had it until he got out here and tried to run today. So I don't have much to report on it, but he's got a sore great toe."

Defensive end Frank Clark, who was limited early in camp due to offseason wrist surgery, has returned to full practice this week and could make his preseason debut on Saturday when the Seahawks play the Chargers.

"It's great to see Frankie out there going," Carroll said. "He's ready to go now, his wrist feels fine. He's back at it, and he'll have a chance to play this weekend."

Cornerback Byron Maxwell, who had been out with a hip-flexor injury, also returned to practice Wednesday.

"Maxie is going to try to play this weekend," Carroll said. "We'll see what happens tomorrow and the next day."

Second-year receiver Amara Darboh, who has also been dealing with a hip flexor injury, is "really close" to being ready to play in this week's game, Carroll said.

"He has been in the early part of practice the last couple of days, so it's like tomorrow they let him go or the next day. So he's close to being able to play this weekend, but he has to get on the field the whole practice the next couple of days to do that."