The Seattle Seahawks and veteran defensive end Chris Clemons have reached agreement on a multiyear contract extension, sources said Monday. An announcement is expected Tuesday.

Clemons, 30, led the Seahawks in sacks with 11 last season. He was entering the final year of his contract and had been seeking an extension. Clemons skipped a mandatory minicamp last month, triggering a contract clause that reduced his 2012 base salary from $4 million to $3 million. The new deal makes that reduction a non-issue.

Contract terms were not immediately available.

At 6-foot-3 and 254 pounds, Clemons fits the pass-rushing role coach Pete Carroll envisioned for him when Seattle traded Darryl Tapp to the Philadelphia Eagles for Clemons and a fourth-round choice in 2010.

Seattle finished last season with 33 sacks, tied for 19th in the NFL. Clemons collected one-third of them, reflecting the team's need for an additional top-flight pass-rusher, which they hope they attained in selecting Bruce Irvin in the first round of this year's draft.