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Seahawks cornerback Richard Sherman has agreed to a four-year contract extension that will make him the highest-paid cornerback in the league, CBS Sports' Jason La Canfora has confirmed. The news was originally reported by Fox Sports' Jay Glazer.

Sherman -- who self-reports that his deal is worth a total of $57.4 million with $40 million guaranteed -- also has weighed in on the situation.

Wrote Sherman on his website: "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."

Richard Sherman has agreed to a contract extension. (USATSI)
Richard Sherman has agreed to a contract extension. (USATSI)

The contract isn't a surprise. Last month La Canfora reported that the sides were nearing a deal and hoped to finish negotiations before the NFL draft began.

As La Canfora noted, the deal would be richer than the $12 million salary the Patriots will pay Darrelle Revis in 2014.

Sherman made $555,000 in 2013, and entering the final year of his rookie contract was scheduled to earn a $1.431 million base salary this season.