Nfl

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Indianapolis Colts defensive back Jamie Silva (40) is helped off the field after being injured during the second half of an NFL preseason football game against the San Francisco 49ers in Indianapolis, Sunday, Aug. 15, 2010. (AP Photo/AJ Mast)

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FILE - In this Nov. 29, 2009, file photo, Buffalo Bills running back Fred Jackson carries during an NFL football game in Orchard Park, N.Y. Jackson has a broken bone in his left hand, leaving his status uncertain for the Bills' season opener. (AP Photo/Mike Groll, File)

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ASSOCIATED PRESS Washington Redskins newly signed James Dearth (67) takes part in a drill during practice at the NFL football team's training camp, Sunday, Aug. 15, 2010, at Redskins Park in Ashburn, Va.

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St. Louis Rams quarterback Sam Bradford throws a pass to Rams running back Chris Ogbonnaya, right, while being hit by Minnesota Vikings defensive tackle Letroy Guion, left, during the second quarter of a preseason NFL football game Saturday, Aug. 14, 2010, in St Louis. (AP Photo/Jeff Roberson)

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St. Louis Rams quarterback Sam Bradford drops back to pass during the second quarter of a preseason NFL football game against the Minnesota Vikings Saturday, Aug. 14, 2010, in St Louis. (AP Photo/Jeff Roberson)

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Washington Redskins quarterback Donovan McNabb scrambles during the first half of an NFL preseason football game against the Buffalo Bills in Landover, Md., on Friday, Aug. 13, 2010. (AP Photo/Alex Brandon)

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FILE - This Oct. 3, 2010, file photo shows San Diego Chargers' Shawne Merriman on the sidelines before an NFL football game against the Arizona Cardinals, in San Diego. Merriman's career with the Chargers is over. Once one of the most-feared players in the NFL, Merriman has been dogged by injuries the last three seasons. (AP Photo/Denis Poroy, File)

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Dallas Cowboys starting quarterback Tony Romo (9) laughs after a slide in the first quarter of the preseason NFL football game against the Oakland Raiders at Cowboys Stadium in Arlington, Texas, Thursday, Aug. 12, 2010. (AP Photo/LM Otero)

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Oakland Raiders line backer Trevor Scott forces a fumble by Dallas Cowboys' quarterback Tony Romo (9) during the first quarter of the preseason NFL football game in at Cowboys Stadium in Arlington, Texas, Thursday, Aug. 12, 2010. (AP Photo/LM Otero)

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ASSOCIATED PRESS Baltimore Ravens quarterback Joe Flacco (5) throws a pass against the Carolina Panthers during the first half of an NFL preseason football game, Thursday, Aug. 12, 2010, in Baltimore.

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ASSOCIATED PRESS New England Patriots' Tom Brady (12) passes the ball under pressure from New Orleans Saints' Bobby McCray, left, as Patriots' Rob Gronkowski, right, blocks in the first half of an NFL preseason football game in Foxborough, Mass., Thursday, Aug. 12, 2010.

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Miami Dolphins wide receiver Brandon Marshall catches a pass during NFL training camp in Davie, Fla., Monday, Aug. 9, 2010. (AP Photo/Alan Diaz)

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FILE - This Aug. 10, 2010, file photo shows Detroit Lions running back Jahvid Best running with the ball during NFL football camp in Allen Park, Mich. The Lions are finding out they're getting more than just a fast running back in first-round pick Jahvid Best. (AP Photo/Paul Sancya, File)

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FILE - This Aug. 11, 2010, file photo shows Tennessee Titans center Kevin Matthews (60) during NFL football training camp , in Nashville, Tenn. (AP Photo/Mark Humphrey, File)

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ASSOCIATED PRESS Washington Redskins quarterback Donovan McNabb looks to pass during practice at the NFL football team's training camp, Saturday, July 31, 2010, at Redskins Park in Ashburn, Va.

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ASSOCIATED PRESS New York Jets head coach Rex Ryan talks with defensive back Antonio Cromartie, right, as a Hard Knocks film crew record the conversation during morning practice at the team's NFL football training camp in Cortland, N.Y., Wednesday, Aug. 4, 2010.