Chris Johnson

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Tennessee Titans running back Chris Johnson (28) runs for a 94-yard touchdown run against the New York Jets in the second quarter of an NFL game on Monday, Dec. 17, 2012, in Nashville, Tenn. (AP Photo/Wade Payne)

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Tennessee Titans running back Chris Johnson (28) runs for a 94-yard touchdown against the New York Jets in the second quarter of an NFL game, Monday, Dec. 17, 2012, in Nashville, Tenn. (AP Photo/Wade Payne)

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Tennessee Titans' Chris Johnson (28) runs against the Buffalo Bills during the first half of an NFL football game in Orchard Park, N.Y., Sunday, Oct. 21, 2012. (AP Photo/Bill Wippert)

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Titans running back Chris Johnson dives in for the first of his two touchdowns Sunday during the first half of Tennessee's win over the Bills in Orchard Park, N.Y. Johnson, who has struggled for much of the season, rushed for 195 yards on the day. (Associated Press)

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associated press Titans running back Chris Johnson, the 24th pick in 2008, is one of only six players in NFL history to rush for 2,000 yards in a season. He ran for 2,006 in 2009.

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Houston Astros' Bill Hall, right, celebrates with Brett Wallace, left, and Chris Johnson after hitting a two-run home run in the fourth inning off Baltimore Orioles pitcher Brad Bergesen during a spring training baseball game in Sarasota, Fla., Tuesday, March 15, 2011. (AP Photo)

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FILE - This Oct. 31, 2010, file photo shows Tennessee Titans running back Chris Johnson during an NFL football game against the San Diego Chargers, in San Diego. From Troy Polamalu's thick mass of curls to Domata Peko's fluffy, lionlike mane to Johnson's dreads to Clay Matthews' grunge look, players all over the NFL are going long. (AP Photo/Denis Poroy, File)

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Tennessee Titans running back Chris Johnson (28) celebrates his touchdown with teammates Fernando Velasco, left, and Ryan Durand (77) during the second half of an NFL football game against the Dallas Cowboys on Sunday, Oct. 10, 2010, in Arlington, Texas. (AP PhotoWaco Tribune-Herald, Jose Yau)

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ASSOCIATED PRESS Tennessee Titans running back Chris Johnson (28) runs against the Dallas Cowboys defense during the first half of an NFL football game Sunday, Oct. 10, 2010, in Arlington, Texas.

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Tennessee Titans running back Chris Johnson (28) jumps over New York Giants' Zak DeOssie (51) as he rushes during the second quarter of an NFL football game at New Meadowlands Stadium on Sunday, Sept. 26, 2010, in East Rutherford, N.J. (AP Photo/Seth Wenig)

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FILE - This Sept. 19, 2010, file photo shows Tennessee Titans running back Chris Johnson (28) getting past Pittsburgh Steelers defensive end Aaron Smith (91) in the third quarter of an NFL football game, in Nashville, Tenn. Figuring out how to stop the Tennessee Titans starts _ and ends _ with Chris Johnson. No NFL defense wants to be beaten by the last man to run for 2,000 yards in a season. (AP Photo/John Russell, File)