Detroit Lions cornerback Phillip Buchanon, bottom, tackles cornerback Chris Roberson during NFL football training camp Monday, Aug. 3, 2009, in Allen Park, Mich. (AP Photo/Paul Sancya)
Detroit Lions linebacker Ernie Sims practices during NFL football training camp Monday, Aug. 3, 2009, in Allen Park, Mich. (AP Photo/Paul Sancya)
Detroit Lions linebacker Julian Peterson practices during NFL football training camp Monday, Aug. 3, 2009, in Allen Park, Mich. (AP Photo/Paul Sancya)
Detroit Lions linebacker Julian Peterson makes a catch during NFL football training camp Monday, Aug. 3, 2009 in Allen Park, Mich. (AP Photo/Paul Sancya)
Detroit Lions linebacker Larry Foote practices during NFL football training camp Monday, Aug. 3, 2009, in Allen Park, Mich. (AP Photo/Paul Sancya)
Detroit Lions quarterback Matthew Stafford watches during NFL football training camp Monday, Aug. 3, 2009 in Allen Park, Mich. (AP Photo/Paul Sancya)
Detroit Lions quarterbacks Matthew Stafford (9) and Daunte Culpepper (11) practice during NFL football training camp Monday, Aug. 3, 2009, in Allen Park, Mich. (AP Photo/Paul Sancya)
Detroit Lions linebacker Julian Peterson practices during NFL football training camp Monday, Aug. 3, 2009 in Allen Park, Mich. (AP Photo/Paul Sancya)
Detroit Lions linebacker Julian Peterson catches a pass during NFL football training camp Monday, Aug. 3, 2009 in Allen Park, Mich. (AP Photo/Paul Sancya)