Richard M. Sherman

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Seattle Seahawks' Richard Sherman, right, embraces head coach Pete Carroll after a news conference Wednesday, May 7, 2014, at the team's headquarters in Renton, Wash. Sherman signed a four-year contract extension Wednesday with the Seahawks, a deal that makes him one of the highest-paid cornerbacks in NFL history. Sherman announced the deal on his website and later confirmed the new deal will keep him in a Seahawks uniform through the 2018 season. Sherman wrote that the extension is for $57.4 million with $40 million guaranteed. (AP Photo/Elaine Thompson)

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Seattle Seahawks' Richard Sherman smiles as he addresses a news conference Wednesday, May 7, 2014, at the team's headquarters in Renton, Wash. Sherman signed a four-year contract extension Wednesday with the Seahawks, a deal that makes him one of the highest-paid cornerbacks in NFL history. Sherman announced the deal on his website and later confirmed the new deal will keep him in a Seahawks uniform through the 2018 season. Sherman wrote that the extension is for $57.4 million with $40 million guaranteed. (AP Photo/Elaine Thompson)

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Seattle Seahawks' Richard Sherman addresses a news conference Wednesday, May 7, 2014, at the team's headquarters in Renton, Wash. Sherman signed a four-year contract extension Wednesday with the Seahawks, a deal that makes him one of the highest-paid cornerbacks in NFL history. (AP Photo/Elaine Thompson)

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Seattle Seahawks' Richard Sherman smiles as he addresses a news conference Wednesday, May 7, 2014, at the team's headquarters in Renton, Wash. Sherman signed a four-year contract extension Wednesday with the Seahawks, a deal that makes him one of the highest-paid cornerbacks in NFL history. Sherman announced the deal on his website and later confirmed the new deal will keep him in a Seahawks uniform through the 2018 season. Sherman wrote that the extension is for $57.4 million with $40 million guaranteed. (AP Photo/Elaine Thompson)

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Seattle Seahawks cornerback Richard Sherman smiles during a panel discussion at Harvard University in Cambridge, Mass., Wednesday, April 23, 2014. Sherman said he refuses to back down from his rant after the NFC championship game because he wants to “educate the uneducated.” (AP Photo/Charles Krupa)

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Seattle Seahawks cornerback Richard Sherman gestures as he answers a question during a panel discussion at Harvard University in Cambridge, Mass., Wednesday, April 23, 2014. Sherman told Harvard students that he refuses to back down from his rant after the NFC championship game because he wants to “educate the uneducated.” (AP Photo/Charles Krupa)

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Seattle Seahawks cornerback Richard Sherman takes a photograph of the audience during a panel discussion at Harvard University in Cambridge, Mass., Wednesday, April 23, 2014. Sherman told Harvard students that he refuses to back down from his rant after the NFC championship game because he wants to “educate the uneducated.” (AP Photo/Charles Krupa)