Detroit Lions defensive tackle Nick Fairley walks off the field following practice at NFL football training camp Thursday, Aug 2, 2012, in Allen Park, Mich. NFL commissioner Roger Goodell, visiting the Lions training camp Thursday says he may discipline Fairley, who is charged with marijuana possession and a DUI in two separate cases in Alabama, before the courts have their say. (AP Photo/Duane Burleson)

Detroit Lions running back Joique Bell runs drills during NFL football training camp in Allen Park, Mich. Monday, July 30, 2012. (AP Photo/Carlos Osorio)

Detroit Lions quarterback Matthew Stafford, left, is followed onto the field by 5-year-old twins Cooper and Carter Aquilina before the start of the Lions' NFL football training camp Sunday, July 29, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions president Tom Lewand, right, and coach Jim Schwartz, left, talk during the Lions' NFL football training camp Sunday, July 29, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions' Ricardo Silva (39), Chris Houston (23), Alphonso Smith (27) and Justin Miller (43) run through an agility drill to begin the third day of their NFL football training camp Sunday, July 29, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive line coach Kris Kocurek, right, instructs rookie defensive end Ronnell Lewis during their NFL football training camp on Sunday, July 29, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive tackle Ndamukong Suh, right, goes up against defensive end Edmon McClam (75) during NFL football training camp on Sunday, July 29, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions rookie defensive end Ronnell Lewis hits a tackling dummy during NFL football training camp on Sunday, July 29, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions quarterback Matthew Stafford warms up during NFL football training camp in Allen Park, Mich. Monday, July 30, 2012. (AP Photo/Carlos Osorio)

Detroit Lions receiver Ryan Broyles makes a catch during NFL football training camp in Allen Park, Mich. Monday, July 30, 2012. (AP Photo/Carlos Osorio)

Detroit Lions running back Erik Coleman runs drills during NFL football training camp in Allen Park, Mich. Monday, July 30, 2012. (AP Photo/Carlos Osorio)

Detroit Lions wide receiver Stefan Logan runs through an agility drill under the watch of running backs coach Sam Gash, left, during an NFL football training camp Saturday, July 28, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions wide receiver Calvin Johnson carries the ball during an NFL football training camp Saturday, July 28, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions Mikel Leshoure runs through an agility drill during an NFL football training camp Saturday, July 28, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions safety Erik Coleman, left, knocks a passed ball away from tight end Will Heller, right, during an NFL football training camp Saturday, July 28, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions wide receiver Titus Young is held by cornerback Alphonso Smith, right, during NFL football training camp Saturday, July 28, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions quarterback Matthew Stafford tosses a pas during their NFL football training camp Saturday, July 28, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions quarterback Matthew Stafford prepares to pass the ball during training camp at the team's NFL football training facility in Allen Park, Mich., Friday, July 27, 2012. (AP Photo/Carlos Osorio)

Detroit Lions coach Jim Schwartz directs during drills at the NFL football team's training facility in Allen Park, Mich., Friday, July 27, 2012. (AP Photo/Carlos Osorio)

Detroit Lions cornerback Chris Houston makes a catch during football drills at the Detroit Lions training facility in Allen Park, Mich. Friday, July 27, 2012. (AP Photo/Carlos Osorio)

Detroit Lions cornerback Dwight Bentley takes a break during football drills at the Detroit Lions training facility in Allen Park, Mich. Friday, July 27, 2012. (AP Photo/Carlos Osorio)

Detroit Lions safety John Wendling catches a ball during football drills at the Detroit Lions training facility in Allen Park, Mich. Friday, July 27, 2012. (AP Photo/Carlos Osorio)

Detroit Lions defensive end Kyle VandenBosch stretches before drills at the team's NFL football training facility in Allen Park, Mich., Friday, July 27, 2012. (AP Photo/Carlos Osorio)

The Detroit Lions run on the indoor practice field at the NFL football team's training facility in Allen Park, Mich., Friday, July 27, 2012. (AP Photo/Carlos Osorio)

Detroit Lions quarterback Kellen Moore passes the ball during training camp at the team's NFL football practice facility in Allen Park, Mich., Friday, July 27, 2012. (AP Photo/Carlos Osorio)

Detroit Lions defensive tackle Ndamukong Suh, foreground, quarterback R.J. Archer, center, and tackle Gosder Cherlius stretch before their football drills for training camp at the team's NFL football practice facility in Allen Park, Mich., Friday, July 27, 2012. (AP Photo/Carlos Osorio)

Detroit Lions president Tom Lewand, left, talks with NFL Commissioner Roger Goodell during the Lions NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive end Nick Fairley, center, walks off the field with teammates following practice at NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions running back Jahvid Best signs autographs following practice at NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

NFL Commissioner Roger Goodell meets with reporters while visiting the Detroit Lions NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

NFL Commissioner Roger Goodell, left, and Detroit Lions vice chairman Bill Ford Jr. watch the Lions practice during NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

NFL Commissioner Roger Goodell takes time to sign memorabilia during his visit to the Detroit Lions NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions linebacker Doug Hogue, left, goes up against teammate Tahir Whitehead during NFL football training camp, Thursday, Aug 2, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions running back Kevin Smith snags a pass during their NFL football training camp Friday, Aug 3, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions wide receiver Jarett Dillard (12) hits a tackling dummy during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions defensive back Ricardo Silva, left, jokes with cornerback Bill Bentley (28) during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions running backs coach Sam Gash, center, works with running back Stephfon Green, left, and cornerback Dwight Bentley (28) during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions linebackers Slade Norris (53) and Travis Lewis begin their morning workout during NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

In this Aug. 10, 2012 photo, Detroit Lions running back Keiland Williams (34) scores a touchdown after a 5-yard run as he is tackled by Cleveland Browns defensive tackle John Hughes (93) in the first quarter of an NFL preseason football game in Detroit. The Lions need options in their depleted backfield without Jahvid Best and Mikel Leshoure, and Keiland Williams gives them one as the first preseason game confirmed.(AP Photo/Duane Burleson)

Detroit Lions cornerback Bill Bentley (28) heads for the field during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions cornerback Bill Bentley, right, is outmaneuvered by wide receiver Titus Young (16) during a pass play at NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)

Detroit Lions cornerback Bill Bentley, left, and defensive back Ross Weaver (38) run through a play during their NFL football training camp Monday, Aug 13, 2012, in Allen Park, Mich. (AP Photo/Duane Burleson)