But overall, they have 14 players who will no longer be under contract when the new league year starts on March 9.
Below is a player-by-player look at the unrestricted free agents.
Steven Hauschka, kicker: He's been the Seahawks' kicker for six seasons, but the team will have to make a decision on Hauschka in the months ahead. In his first six seasons in the league, Hauschka missed three extra points. In the past two seasons, he's missed 10. Coach Pete Carroll often pointed out that Hauschka's kicks were too low on those tries. He still has a strong leg, though. Hauschka hit 9 of 11 field goals from 40 yards or longer in 2016. And the Seahawks' kickoff unit ranked third, according to Football Outsiders' metrics. Per OverTheCap.com, the top 10 kickers are making at least $3 million per year. Hauschka's last contract paid him $2.85 million annually. The Seahawks will have to decide whether they want to give him a bump or save money at this spot and spend it on other parts of the roster.
Luke Willson, TE: He's started 30 games the past four years. Willson was the No. 2 tight end behind Jimmy Graham last season. He saw a career-low 21 targets and caught 15 balls for 129 yards. Carroll praised Willson for being a great locker room guy and said the team has had previous discussions with him about an extension but weren't able to get something done. Graham is going into the final year of his deal, and the team drafted Nick Vannett in the third round in 2016. This could be a situation where Willson tests the market but is ultimately brought back.
Mike Morgan, LB: He's been with the team for six seasons and was the starting Sam linebacker last season but missed seven games in the middle of the season because of sports hernia surgery. Morgan came off the field in nickel and only ended up playing 12.8 percent of the Seahawks' defensive snaps on the season. Carroll indicated recently that the Seahawks need to upgrade their linebacker depth, but Morgan still has a chance to return.
Bradley Sowell, OT: He started the season at left tackle but suffered an injury and lost his job to George Fant. Sowell then saw time at right tackle before the Seahawks went back to Garry Gilliam. He was inactive for three of the last four games (playoffs included). Sowell seems unlikely to return.
Tony McDaniel, DT: He was a surprise addition last summer and appeared in every game, starting 11 before being replaced by rookie Jarran Reed. McDaniel showed he could still hold up against the run, but given that he's 32 years old, the Seahawks are likely to go younger at this spot.
Will Tukuafu, FB: The Seahawks signed him after the season started. He's played fullback, tight end and defensive tackle. Tukuafu suffered a concussion in Week 13. He's not a factor as a ball-carrier or receiver and is unlikely to be back.
Marcel Reece, FB: The Seahawks signed Reece after Tukuafu's injury, and he was the fullback for the last four games of the regular season and the playoffs. Reece turns 32 in June. The Seahawks are likely to look for a younger fullback this offseason.
Kelcie McCray, SS: He started four games in place of Kam Chancellor and was a solid backup. But late in the season when Chancellor came out of a game with an injury, the Seahawks went with Jeron Johnson instead of McCray. McCray is a core special-teams player, but he'll likely have a better chance to compete for playing time elsewhere.
Jeron Johnson, SS: The Seahawks signed Johnson before Week 14, and he played mostly a special-teams role. If he's brought back, he'll be competing for a roster spot.
Neiko Thorpe, CB: He signed with the Seahawks in September and made the most of his opportunity, leading the team with 10 special-teams tackles. Given DeShawn Shead's injury, it makes sense for Seattle to bring Thorpe back to play special teams and compete at corner.
Brandon Williams, TE: He didn't show much offensively but was a core special-teams player. If Williams is brought back, he'll be competing for a roster spot.
John Jenkins, DT: He signed with the Seahawks late in the season and played in two games before suffering an injury. Jenkins returned to play eight snaps in the wild-card game versus the Detroit Lions.
Damontre Moore, DE: He played four games with the Seahawks and showed flashes of production before suffering a season-ending injury. Moore was arrested in December for driving under the influence and driving with a suspended license.
Devin Hester, returner: In the playoff loss to the Atlanta Falcons, Hester looked like he could still contribute, but he said after that game that he's retiring. We'll see if he changes his mind down the road.