Seahawks coach Pete Carroll addressed the media following Sunday's practice, which was the team's third mock game of camp, and in addition discussion the action on the field, he also gave health updates on a handful of players, including defensive end Branden Jackson, who was placed on injured reserve earlier in the day.

Jackson left a scrimmage at CenturyLink Field earlier this month after a helmet-to-helmet collision knocked him unconscious, and Carroll said concerns about spinal issues led to Jackson being shut down for the year.

"It's a situation where (doctors) don't recommend him playing this season," Carroll said. "He really came out of that episode OK, but the testing did show him that he had a physical trait that they want to protect, so everybody has been convinced that the best thing to do is for him not to play this year. I don't know that that's forever, but I do know for right now. He's not injured right now, but he's susceptible—it's similar to situations a couple of our other guys have had in the past. We're erring on the side of long-term health and taking care of our guys."

Carroll later confirmed that the other guys he was referring to were Kam Chancellor and Cliff Avril, both of whom had their careers ended by neck injuries. Carroll also said that the Seahawks hope to have Jackson around the team as much as he wants to be this season.  

"He is a great team guy, we love him on our team, and he's got such spirit," Carroll said. "He's got great versatility too in his play, but he's just been such a great guy in this locker room. We're going to miss him. I asked him to stay around as long as he wants to to be with us all along, and I hope he'll be able to do that."

In other injury news, Carroll said they hope to get three receivers who have been out recently back to practice following a day off Monday: Phillip Dorsett II, John Ursua and Cody Thompson.

"Phillip, if everything goes right over this one-day break, he's going to be back in a limited fashion," Carroll said. "Cody Thompson comes back to us as well, and Johnny Ursua should have a chance to come back also… Phil, we're going to have to figure out how he handles it. We know what his condition is and his situation with the sore foot, we've just got to manage him really well."

Cornerback Tre Flowers didn't practice Sunday with that Carroll called, "a slightly sprained ankle."

Defensive end Benson Mayowa was out again Sunday, though Carroll didn't give specifics on his injury, saying, "Benson has been banged up a little bit the last couple of days, but he has made a really good impression."

Offensive tackle Cedric Ogbuehi "banged up his shoulder a little bit" in the scrimmage, Carroll said.

Carroll also gave updates on two rookies who have not been able to practice due to injuries: defensive end Darrell Taylor, who had surgery last winter after playing his final season at Tennessee with a fracture in his leg, and tight end Colby Parkinson, who hurt his foot working out in the offseason.

Asked if Parkinson could be ready for the season opener, Carroll said, "It's possible. This week coming up is really important. If we can get him back this week, then obviously that'll be a positive step for him, but I don't know that yet."

Taylor, who was away for the birth of his daughter, "is still a few weeks away," Carroll said. "It's going to hard for him to make the opener. He's going for it, but we've got to get him on ground running more than he has so far. He was away for the couple of days with the birth of his daughter, but he's steeped in rehab right now trying to get him right."