Seattle Seahawks cornerback Richard Sherman, left, celebrates with Seahawks wide receiver Doug Baldwin (89) after Baldwin's third touchdown reception, in the second half an NFL football game against the Baltimore Ravens, Sunday, Dec. 13, 2015, in Baltimore.

Seattle Seahawks' Richard Sherman (25) intercepts a pass in front of Green Bay Packers' Davante Adams (17) during the first half of the NFL football NFC Championship game Sunday, Jan. 18, 2015, in Seattle.

Seattle Seahawks cornerback Richard Sherman (25) carries a turkey off the field after the Seahawks beat the San Francisco 49ers 19-3 in an NFL football game in Santa Clara, Calif., Thursday, Nov. 27, 2014.

Seattle Seahawks free safety Earl Thomas (29) and cornerback Richard Sherman (25) celebrates outside linebacker Malcolm Smith's (53) interception during the NFL football NFC Championship game against the San Francisco 49ers, Sunday, January 19, 2014, in Seattle. Smith's interception sealed the win for the Seahawks as they they defeated the San Francisco 49ers to advance to Super Bowl XLVIII.

Seattle Seahawks cornerback Richard Sherman (25) looks on during an NFL football game against the New Orleans Saints on Sunday, Oct. 30, 2016, in New Orleans. New Orleans won 25-20. (Aaron M. Sprecher via AP)

Seattle Seahawks cornerback Richard Sherman (25) fires up the crowd during an NFL NFC Wild Card Game against the Detroit Lions on Saturday, January 7, 2017. The Seahawks defeated the Lions 26-6. (Kevin Terrell via AP)

Seattle Seahawks defensive back Richard Sherman (25) looks up from the field with his helmet off during a NFL Thursday Night Football game against the Los Angeles Rams, Thursday, December 15, 2016 in Seattle. The Seahawks won the game 24-3. (Paul Jasienski via AP)

Seattle Seahawks cornerback Richard Sherman (25) walks onto the field with safety Kam Chancellor (31) and defensive back DeShawn Shead (35) prior to an NFL football game against the Los Angeles Rams at the Los Angeles Memorial Coliseum, Sunday, Sept. 18, 2016, in Los Angeles.

Seattle Seahawks cornerback Richard Sherman (25) runs onto the field from the tunnel prior to an NFL football game against the Carolina Panthers on Sunday, Dec. 4, 2016, in Seattle. Seattle won 40-7.

Seattle Seahawks cornerback Richard Sherman (25) talks to side judge Alex Kemp (55) during an NFL football game against the New Orleans Saints on Sunday, Oct. 30, 2016, in New Orleans. New Orleans won 25-20.

Seattle Seahawks cornerback Richard Sherman (25) and other players cheer in huddle before the first half of an NFL football NFC divisional playoff game between the Atlanta Falcons and the Seattle Seahawks, Saturday, Jan. 14, 2017, in Atlanta.

Seattle Seahawks defensive back Richard Sherman (25) pumps up the crowd during an NFC Wild Card game against the Detroit Lions on Saturday, Jan. 7, 2017, in Seattle, Wash. The Seahawks won the game, 26-6.

Seattle Seahawks' Richard Sherman tips a pass intended for San Francisco 49ers' Michael Crabtree (15) in the final seconds of the second half of the NFL football NFC Championship game Sunday, Jan. 19, 2014, in Seattle. Malcolm Smith intercepted the tipped pass. The Seahawks won 23-17 to advance to Super Bowl XLVIII.

Seattle Seahawks' Richard Sherman celebrates with fans after after the NFL football NFC Championship game against the San Francisco 49ers Sunday, Jan. 19, 2014, in Seattle. The Seahawks won 23-17 to advance to Super Bowl XLVIII.

Seattle Seahawks cornerback Richard Sherman (25) goes up for a ball during the first half of an NFC divisional playoff NFL football game against the Atlanta Falcons Sunday, Jan. 13, 2013, in Atlanta.

Seattle Seahawks' Richard Sherman holds up the George Halas Trophy after the NFL football NFC Championship game against the San Francisco 49ers Sunday, Jan. 19, 2014, in Seattle. The Seahawks won 23-17 to advance to Super Bowl XLVIII.

Chicago Bears wide receiver Brandon Marshall (15) is guarded by Seattle Seahawks cornerback Richard Sherman (25) in the first half of an NFL football game in Chicago, Sunday, Dec. 2, 2012.

Seattle Seahawks' Richard Sherman celebrates after the Seahawks score a safety in the first half of an NFL football game against the San Francisco 49ers, Sunday, Sept. 15, 2013, in Seattle.

Seattle Seahawks' Richard Sherman (25) takes the field during player introductions before an NFL football game against the New Orleans Saints, Monday, Dec. 2, 2013, in Seattle.

Seattle Seahawks cornerback Richard Sherman (25) during an NFL game against the San Francisco 49ers on Sunday, Sep. 15, 2013 in Seattle. The Seahawks won the game, 29-3.

Seattle Seahawks cornerback Richard Sherman (25) during an NFL preseason game against the San Diego Chargers on Thursday, Aug. 8, 2013 in San Diego. The Seahawks won the game, 31-10. (Ric Tapia/NFL)

Seattle Seahawks cornerback Richard Sherman (25) during an NFL game against the Arizona Cardinals on Thursday, Oct. 17, 2013 in Glendale, Ariz. The Seahawks won the game, 34-22.

Seattle Seahawks Richard Sherman (25) comes up with the football as Seahawks' Earl Thomas (29) celebrates after Sherman intercepted an Arizona Cardinals pass in the second half of an NFL football game, Sunday, Dec. 22, 2013, in Seattle.

Seattle Seahawks cornerback Richard Sherman (25) during an NFL regular season game against the San Francisco 49ers on Sunday, Dec. 8, 2013 in San Francisco. The 49ers won the game, 19-17. (Ric Tapia/NFL)

Seattle Seahawks' Richard Sherman (25) talks with New England Patriots quarterback Tom Brady after an NFL football game, Sunday, Oct. 14, 2012, in Seattle. The Seahawks won 24-23.

Seattle Seahawks' Richard Sherman (25) knocks the ball away from New York Jets' Chaz Schilens (85) as Seahawks' Marcus Trufant (23) collides with Jets' Jeremy Kerley during the second half of an NFL football game, Sunday, Nov. 11, 2012, in Seattle. The Seahawks won 28-7.

Houston Texans wide receiver Andre Johnson (80) is tripped up by Seattle Seahawks cornerback Richard Sherman (25) during an NFL football game at Reliant Stadium on Sunday September 29, 2013 in Houston, Texas. Seattle won 23-20.

Seattle Seahawks cornerback Richard Sherman (25) returns an interception from Arizona Cardinals quarterback John Skelton for a 19-yard touchdown during the second quarter of an NFL football game in Seattle, Sunday, Dec. 9, 2012.

Seattle Seahawks' Richard Sherman throws out the ceremonial first pitch before a baseball game between the Texas Rangers and Seattle Mariners Thursday, April 11, 2013, in Seattle.

Seattle Seahawks Richard Sherman runs off the field after the Seahawks beat the San Francisco 49ers 42-13 in an NFL football game, Sunday, Dec. 23, 2012, in Seattle.

Seattle Seahawks head coach Pete Carroll celebrates an interception by cornerback Richard Sherman (25) with Sherman and Doug Baldwin (15) in the second half of an NFL football game in Chicago, Sunday, Dec. 18, 2011. The Seahawks won 38-14.

Seattle Seahawks cornerback Richard Sherman (25) celebrates his interception against the Chicago Bears with teammate Brandon Browner (39) in the second half of an NFL football game in Chicago, Sunday, Dec. 18, 2011. The Seahawks won 38-14.

Seattle Seahawks cornerback Richard Sherman during warm ups before the NFL football game against the St. Louis Rams, Monday, Dec. 12, 2011, in Seattle.

Seattle Seahawks' Richard Sherman, left, intercepts a pass meant for Washington Redskins' Santana Moss as Seahawks' Kam Chancellor follows in the second half of an NFL football game, Sunday, Nov. 27, 2011, in Seattle.

Cleveland Browns tight end Evan Moore (89) is upended by Seattle Seahawks defensive back Richard Sherman after a catch in the second quarter of an NFL football game Sunday, Oct. 23, 2011, in Cleveland.

Seattle Seahawks' Richard Sherman carries the ball in the second half of a preseason NFL football game against the Oakland Raiders in Seattle on Sept. 2, 2011.

Stanford players Doug Baldwin, left, and Richard Sherman lift the OB trophy after the Orange Bowl NCAA college football game in Miami, Monday, Jan. 3, 2011. Stanford defeated Virginia Tech 40-12.

Stanford head coach Jim Harbaugh, left, hugs Richard Sherman after defeating Notre Dame in an NCAA college football game in South Bend, Ind., Saturday, Sept. 25, 2010. Stanford defeated Notre Dame 37-14.

Stanford's Richard Sherman runs an interception back for a touchdown during the second half of a NCAA college football game against Southern California in Los Angeles on Saturday, Nov. 14, 2009. Stanford won 55-21.

Stanford wide receiver Richard Sherman, left, is hauled down from behind by Arizona State linebacker Mike Nixon in the first quarter of an NCAA football game Saturday, Sept. 6, 2008, in Tempe, Ariz.

Stanford's Evan Moore, right, and Richard Sherman celebrate after Stanford upset Southern California, 24-23, in a football game in Los Angeles on Saturday, Oct. 6, 2007.