Seahawks should re-sign these players
Offensive tackle Jake Curhan
Curhan will never be a long-term starter in the NFL but he is fine in a pinch. He isn't great in pass protection but he is fine as a run blocker. Plus, Seattle probably needs to run the ball more.
Defensive end Mario Edwards, Jr.
Edwards has probably undersold himself, or his agent has, for his entire career. He has rarely made $2 million a season but for a veteran who is good against the run and supplies occasional pass rush - he has had at least 2 sacks a year in seven straight seasons and 5 or more quarterback hits in every year of his nine-year career except two - he should get paid more. All that said, he likely won't be expensive again next year and Seattle should re-sign him and make him a part of the defensive line rotation.
Cornerback Mike Jackson (RFA)
Jackson being a restricted free agent almost guarantees he will be back in Seattle. The Seahawks can match any offer he gets and since Jackson went from a 2022 starter to being on the bench to begin 2023 probably makes him less desirable. But Jackson was graded as the 20th-best cornerback in the league this year, according to Pro Football Focus (subscription required). In six games this year, he allowed less than 10 yards a reception when he was targeted.
Defensive tackle Myles Adams (ERFA)
Adams might struggle with injuries from time to time, but he also probably does not get enough playing time. In limited snaps this year he still graded as the Seahawks' third-best defensive lineman, according to PFF. He might never ever be much more than a rotational run-stopper but that is what Seattle needs.