The Seahawks signed Nkemdiche on Thursday, John Boyle of the team's official site reports.
Nkemdiche, who the Cardinals made a first-round pick in the 2016 NFL Draft, has recorded just 4.5 sacks in his career, all of which he recorded in 2018. Since suffering a torn ACL late that season, the 26-year-old has only appeared in two games. Nkemdiche will aim to provide the Seahawks with added defensive tackle depth in 2021.