Seattle Seahawks star Richard Sherman has signed a four-year, $57.4 million contract extension, a deal that easily makes him the highest-paid cornerback in the NFL.

Sherman announced the deal Wednesday on his Twitter account and on his blog page, saying the extension includes $40 million in guaranteed money.

The deal will pay Sherman an average salary of more than $14 million, exceeding the $12 million that Darrelle Revis is making with the New England Patriots.

"The goal has always been to stay in Seattle and continue to play for the Seahawks," he wrote on his blog. "With this chapter closed, I can continue to focus on what is important -- defending our Super Bowl Championship and being the best cornerback in the NFL.

"This is a great moment for my family, foundations and the people who supported me to this point. Hard work and execution got me to this moment, the Seattle Seahawks have backed up that respect with this contract. The terms of my deal are 4 years for a total of $57.4M with $40M guaranteed. There is no other city or team that I would want to play football for."

Sherman also had a quip for the Seahawks' owner.

"I'd like to thank Paul Allen for anteing up," Sherman said.

The two stars on Seattle's Legion of Boom secondary have now both secured long-term deals. Sherman joins free safety Earl Thomas, who became the highest-paid safety in the league last week with a contract extension that will pay him $40 million over four years.

"It was headed in the right direction for several weeks,'' general manager John Schneider said. "I thought it was time to get it tied up and let everybody move forward.''