Seahawks backup Tarvaris Jackson has high ankle sprain

Seahawks backup quarterback Tarvaris Jackson sustained a high ankle sprain against the Broncos. Elaine Thompson/AP

RENTON, Wash. -- The severity of the injury that Seattle Seahawks backup quarterback Tarvaris Jackson sustained against the Broncos became more clear Monday with coach Pete Carroll announcing it's a high ankle sprain. The team's plan, however, is still unclear.

Carroll said the Seahawks are evaluating their options and that the team worked out an unspecified quarterback on Monday.

"We're looking at it," Carroll said.

Jackson was injured in Friday night's preseason opener when a Denver player fell on his right ankle. He limped off the field and was replaced by third-string quarterback R.J. Archer, who played the remainder of the game.

"His ankle is legitimately sprained -- he's got a high ankle," Carroll said of Jackson. "We don't know how long it's going to take. Guys respond differently to these. He feels pretty good about it. We're hoping it's a couple weeks only."

That could be an optimistic timetable given how long it typically takes players to return from high ankle sprains. In the meantime, or until Seattle adds another quarterback, Archer becomes the No. 2 behind Russell Wilson. The Seahawks have another in-house option in B.J. Daniels, who was a practice squad quarterback before converting to wide receiver earlier this offseason. Carroll said Daniels will take some reps at quarterback and that as of now he would be the third quarterback if one were needed in a game.

Daniels made two catches for 15 yards on Friday and also had a tackle on special teams in his first game as a wide receiver. On Monday, he made a one-handed catch to haul in a deep pass and also snagged a low bullet from Wilson near the goal line. Carroll was asked whether Daniels spending some of his time at quarterback will stall his development as a receiver.

"We're going to try to not let it," Carroll said. "He's going to stay in the receiver room and let him keep competing at that spot. He's done a nice job so far. He had a really good day today. We're going to try to not let it become a distraction for him."

Here are some other injury notes to come out of Carroll's post-practice media availability:

  • Carroll said it's too soon to know when cornerbacks Richard Sherman and Will Blackmon will return to practice. Both missed Friday's preseason opener, Sherman because of an issue with his hip flexor and Blackmon because of a groin injury. "They ran today for the first time so it's just a process of getting them back," Carroll said. "I don't know when they'll return. Both of them had slight strains so we just didn't want to aggravate them. That will be day-to-day to show us how they can progress."

  • Cornerback Tharold Simon, who is coming off shoulder surgery, was activated off the physically unable to perform list on Monday and took part in warm-ups before sitting out the remainder of practice. Carroll said Simon likely won't play Friday against Kansas City but he should play in Seattle's third preseason game. "He's on his way back. Tharold will work tomorrow," Carroll said. "If everything goes well from today, he'll work all of the drills and start to get some team work, too."

  • Wide receiver Chris Matthews has "a chance to make it back in about 10 days" from the sprain he sustained in the AC joint of his left shoulder Friday, Carroll said. "It could be quicker," he added.

  • Carroll said it's "still realistic" for free safety Earl Thomas to play in Seattle's regular-season opener on Sept. 13. Thomas had offseason shoulder surgery to repair a torn labrum and has remained a spectator for the most part even after being activated off PUP two weeks ago. Carroll said on Aug. 8 that he hopes Thomas could begin practicing in earnest in a couple weeks.

  • Carroll said wide receiver Paul Richardson is "way ahead of schedule" in his recovery from surgery to repair a torn ACL, which he sustained in January. Carroll even called Richardson's recovery "miraculous" but wasn't sure if he'll be ready by Week 1. If not, Richardson would likely begin the season on PUP and would have to miss at least the first six games.