The backup suffered a high-ankle sprain during Friday’s 22-20 exhibition loss to the Denver Broncos, coach Pete Carroll confirmed Monday.

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RENTON — Seahawks backup quarterback Tarvaris Jackson suffered a high-ankle sprain during Friday’s 22-20 presason loss to the Denver Broncos, coach Pete Carroll confirmed Monday.

Whether that has the team on high alert in terms of its backup-quarterback situation, though, is to be determined

Carroll said Jackson thinks he will be out only a couple weeks.

“He feels pretty good about it,’’ Carroll said.

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If so, that means the team doesn’t necessarily have to worry about making a move to acquire a backup quarterback for the long term.

Still, the Seahawks are expected to sign former Kansas State quarterback Jake Waters to add a player at the position while Jackson is out.  Seattle had only two quarterbacks Monday — starter Russell Wilson and R.J.Archer.

B.J.Daniels, the third-team quarterback at the end of last season, has been moved to receiver and returner and appears to have a legitimate shot to make the team in that role. He took a couple of snaps at quarterback Monday, and Carroll said he could be a third quarterback if needed.

But Carroll said the team does not want to affect Daniels chance to make the team as a receiver/returner by having him fill in at quarterback for more than just a few plays here and there.

“We’re going to try and not let it become a distraction for him,’’ Carroll said. “It’s kind of a back-burner thought, but he’ll get some reps every day. We’re going to kind of bank on what’s happened in the past ’cause we want to give him the competitive shot at the receiver spot.”

Daniels said he is open to whatever the team asks.

“Yeah, if they tell me tomorrow to be a kicker, then I’ll do that,’’ he said.

As for adding another quarterback, Carroll said after practice Monday the team is “looking at it. We looked at a guy today, and we’ll just keep looking at it. ‘’

The Seahawks apparently looked at it enough to agree to terms with Waters, who was a college teammate of receiver Tyler Lockett. The team had Waters in for a workout earlier this month. Waters, who went unselected in the 2015 draft, was signed by Jacksonville after the draft but then released in June when the Jags signed former WSU QB Jeff Tuel. The signing of Waters could become official before the team practices Tuesday.

Waters was a second-team All-Big 12 player last year at Kansas State and is a solid dual-threat player who set a new KSU record for total touchdowns last season with 31.

Jackson, the backup the past two seasons, was re-signed to a one-year deal in June guaranteeing him $1.5 million this season.

Secondary should get healthier soon

Due to a variety of issues, the Seahawks’ secondary was especially thin Monday, with eight defensive backs sitting out.That compelled them to sign two cornerbacks — Jeremy Crayton and Keelan Johnson — and release linebacker Dakorey Johnson and defensive tackle Jimmy Staten.

But the secondary should get healthier soon. Cornerbacks Richard Sherman (hip) and Will Blackmon (groin) sat out Monday, but Carroll said both could return Tuesday. And cornerback Tharold Simon, rehabbing from offseason shoulder surgery, came off the PUP list and participated in the individual-drills portion of practice.

Carroll said it remains realistic that free safety Earl Thomas will be ready for the Sept. 13 season opener against the Rams. Thomas has yet to practice but is off the PUP list and takes part in walk-throughs. Carroll said the team is devising a plan to get Thomas enough work so he’s ready for the season.