The Seattle Seahawks have signed Michael Bennett to a multiyear contract extension, preventing the defensive end from becoming an unrestricted free agent.

League sources confirmed to ESPN NFL Insider Adam Schefter that Bennett signed a four-year, $28.5 million deal, with $16 million guaranteed.

Bennett will make $10 million in the first year, $6 million in the second year, $5 million in the third year and $7.5 million in the final year.

Two teams offered more, sources told Schefter, but Bennett opted to stay in Seattle.

The Seahawks announced the deal via Twitter on Monday, one day before the start of free agency.

Bennett also took to Twitter, praising Seahawks fans.

I m back I m happy super bow champ .The 12th man is the biggest reason I came back the best fan - Michael Bennett (@mosesbread72) March 10, 2014

Bennett was Seattle's best defensive lineman in 2013 after signing a one-year deal worth $4.8 million. He played his first four seasons with Tampa Bay after the Seahawks released him as an undrafted rookie in 2009.

"I mean, I always bet on myself and believe in myself and my talents, and being able to come here and get a chance to play with these guys, I knew it was going to be special," Bennett said on Feb. 5.

The 6-foot-4 Bennett was everything and more the Seahawks hoped he would be when they brought him back for the 2013 season. He had 8.5 sacks in the regular season along with one forced fumble and one fumble recovery, which he returned 22 yards for a touchdown.