Defending Sprint Cup champions Brad Keselowski hands back an autographed item to a fan during NASCAR Preview 2013, Saturday, Feb. 9, 2013, in Charlotte, N.C. (AP Photo/Bob Leverone)

Associated Press
Defending Sprint Cup champions Brad Keselowski hands back an autographed item to a fan during NASCAR Preview 2013, Saturday, Feb. 9, 2013, in Charlotte, N.C. (AP Photo/Bob Leverone)
Defending Sprint Cup champions Brad Keselowski hands back an autographed item to a fan during NASCAR Preview 2013, Saturday, Feb. 9, 2013, in Charlotte, N.C. (AP Photo/Bob Leverone)
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