The Seahawks head to St. Louis for their season opener Friday, and will do so with almost their entire roster available for Sunday's game.

As had been the hope going into this week, backup quarterback Tarvaris Jackson has made enough progress coming back from a high-ankle sprain that he will be available against the Rams.

"He practiced really well," Carroll said. "He's ready to go."

Tight end Cooper Helfet, who was limited early in the week with a knee injury, practiced fully Thursday and Friday, and is also ready to go, Carroll said.

The only player not expected to be available is linebacker Mike Morgan, who is still recovering from a hamstring injury suffered in Seattle's third preseason game. Morgan is running well, however, and has a chance to make it back next week, Carroll said. Cornerback Tharold Simon was new to the injury report Friday with a toe injury, and is listed as questionable, but Carroll said he expected that Simon will be available.

Also available this week is none other than All-Pro free safety Earl Thomas, who has been practicing but was held out of preseason games following offseason shoulder surgery. Being limited as he eased his way back into action was tough on the ultra-competitive Thomas, and Carroll is eager to see Thomas back in action.

"This was really a challenge," Carroll said. "None of us are in the head of Earl Thomas, he's very, very unique. He was very quiet through the process and just kept working at it and just waiting for the time he could get back on the field. As soon as he did, he exhibited all the speed and the savvy that he has, but it's been very hard for him. He speaks so loudly when he plays. I'm really anxious for his sake to get him back out there and going again. We'll see how he does. He may be a little rusty and it may take him a little bit of time, and it just may not. I wouldn't be surprised if he plays just like he always does."

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Though not injury related, there was some question as to whether two players recently added to the roster could be ready to play after just one week of practice, but Carroll said that running back Fred Jackson and safety Kelcie McCray will both be ready to play in Sunday's game. Jackson in particular sounds like somebody who will have a significant role despite having just four practices under his belt with his new team.

"He's everything that he's billed," Carroll said of Jackson. "Everybody talks about him being a great person and a strong, strong competitor. He's really well-versed, he can catch the ball, he blocks really well, he has a great understanding of the game. He has learned the offense—I don't know how a guy can do that in four days, but he has. He's ready to play and play in all situations for us."

Another quick learner, though over a bit longer period of time, has been receiver Tyler Lockett. Despite being a rookie playing a position that can sometimes take a while to learn at the NFL level, Lockett will be a big part of the offensive game plan, Carroll said.

"Really, we haven't seen anything from him where we need to restrict him where we need to not put him outside or match him up in certain ways," Carroll said. "We really like him all around. He's still developing with us, he's still in a big process of developing the things we can count on from him and learning him and all of that, but right now we're not restricting him anywhere. He'll play in all spots in this game."

As for Marshawn Lynch wearing Kam Chancellor's jersey Thursday, Carroll said the gesture was not a big deal in his mind.

"I thought it was a statement that all of us understand," Carroll said. "We all wish Kam was here. I had no problem with it. We don't need to keep doing it, but it was just that."

Carroll was also asked about reports that the Seahawks are planning to sign former 49ers linebacker Nick Moody—Moody himself tweeted a photo of a Seahawks helmet—and while Carroll didn't deny that a move could happen, he said any such reports are premature.

"That's an early report," he said. "He's not even here yet, we haven't talked to him in person yet. You'll see what happens. It's going to take him a couple of days before we get him here."

Here's the official practice report for both teams:

Seattle Seahawks

Out

LB Mike Morgan (hamstring)

Questionable

CB Tharold Simon (toe, limited participation)

Probable

RB Marshawn Lynch (not injury related, full participation)

QB Tarvaris Jackson (ankle, full participation)

TE Cooper Helfet (knee, full participation)

St. Louis Rams

Out

RB Todd Gurley (knee)

Questionable

RB Tre Mason (thigh, did not participate in practice)

LB Daren Bates (knee, limited)