Minnesota Vikings quarterback Donovan McNabb throws a pass after the players union ratified the new collective bargaining agreement and free agents were allowed to participate in NFL football training camp, Thursday, Aug. 4, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings quarterback Donovan McNabb (5) heads to the practice field after a new 10-year collective bargaining agreement was ratified, during NFL football training camp Thursday, Aug. 4, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings quarterback Donovan McNabb speaks to reporters Thursday, Aug. 4, 2011, in Mankato, Minn., following practice at NFL football training camp. NFL players ratified a new, 10-year collective bargaining agreement Thursday, hours after it was finalized, and free agents were allowed to begin practicing with their teams. (AP Photo/Jim Mone)

Minnesota Vikings running back Adrian Peterson carries the ball during a walk-through practice session upon Peterson's return to practice Friday, Aug. 5, 2011 in Mankato, Minn., following the birth of a son this week. (AP Photo/Jim Mone)

Minnesota Vikings defensive tackle Kevin Williams, left, and defensive end Jared Allen, right, accompany running back Adrian Peterson to the practice field upon Peterson's return to practice Friday, Aug. 5, 2011 in Mankato, Minn., following the birth of a son this week. (AP Photo/Jim Mone)

Minnesota Vikings quarterback Donovan McNabb, left, celebrates with quarterbacks coach Craig Johnson after news that the collective bargaining agreement was ratified by players and free agents were allowed to participate in practice, during the NFL football team's practice Thursday, Aug. 4, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings quarterback Donovan McNabb is handed his purple helmet by quarterbacks coach Craig Johnson after news that the collective bargaining agreement was ratified and free agents were allowed to participate in NFL football practice, Thursday, Aug. 4, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings rookie quarterback Christian Ponder covers his head with a towell after a walk-through workout at the NFL football team's practice Friday, Aug. 5, 2011 in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings rookie quarterback Christian Ponder calls signals during a walk-through workout at the NFL football team's practice Friday, Aug. 5, 2011 in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings quarterback Donovan McNabb, left, puts his new helmet on after the players union ratified the new collective bargaining agreement and free agents were allowed to participate in NFL football training camp, Thursday, Aug. 4, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings quarterback Donovan McNabb calls signals during a walk-through workout at the NFL football team's practice Friday, Aug. 5, 2011 in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings wide receiver Percy Harvin catches the ball during a walk-through workout at the NFL football team's camp Thursday, Aug. 4, 2011 in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings wide receiver Percy Harvin smiles during a walk-through workout at the NFL football team's camp Thursday, Aug. 4, 2011 in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings defensive end Jared Allen signs autographs after NFL football training camp, Thursday, Aug. 4, 2011, in Mankato, Minn. Cook signed a contract Wednesday. (AP Photo/Jim Mone)

Minnesota Vikings head coach Leslie Frazier addresses his team after a walk-through practice at NFL football training camp, Thursday, Aug. 4, 2011 in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings cornerback Chris Cook reacts after watching a missed play during NFL football camp, Wednesday, Aug. 3, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings tackle Charlie Johnson talks with a teammate during the NFL football team's practice Wednesday, Aug. 3, 2011 in Mankato, Minn. Johnson, who can't officially workout until Thursday, is expected to take the place at left tackle of Bryant McKinnie who was released Tuesday. (AP Photo/Jim Mone)

Minnesota Vikings tackle Phil Loadholt waits for the start of practice at NFL football training camp, Wednesday, Aug. 3, 2011 in Mankato, Minn. Loadholt could be moved to left tackle if Charlie Johnson doesn't play there as the Vikings prepare to replace the released Bryant McKinnie. (AP Photo/Jim Mone)

Minnesota Vikings first round draft pick quarterback Christian Ponder, out of Florida State, throws in front of Vikings new quarterback Donovan McNabb, left, during NFL football training camp Monday, Aug. 1, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings running back Adrian Peterson takes the handoff from quarterback Joe Webb (14) during NFL football training camp Monday, Aug. 1, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings new quarterback Donovan McNabb, left, jokes around with first round draft pick, quarterback Christian Ponder, out of Florida State, during NFL football training camp Monday, Aug. 1, 2011, in Mankato, Minn. Under league rules, McNabb cannot practice until Thursday. (AP Photo/Jim Mone)

Minnesota Vikings players and coaches kneel for a moment of silence in honor of the 10th anniversary of right tackle Korey Stringer's death before NFL football training camp Monday, Aug. 1, 2011, in Mankato, Minn. Stringer died after heat stroke during training camp in 2001. (AP Photo/Jim Mone)

Minnesota Vikings new head coach Leslie Frazier, standing center, watches his team go through calisthenics during NFL football training camp Monday, Aug. 1, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings linebackers coach Mike Singletary, front left, demonstrates a drill during NFL football training camp Monday, Aug. 1, 2011, in Mankato, Minn. Players, from left, are Ross Homan, Heath Farwell, Kenny Onatolu and Chad Greenway. (AP Photo/Jim Mone)

Minnesota Vikings tackle DeMarcus Love cools off with some water during NFL football training camp Monday, Aug. 1, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings tackle Phil Loadholt takes a moment before the start of NFL football training camp Monday, Aug. 1, 2011, in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings rookie quarterback Christian Ponder from Florida State works out during NFL football training camp,Tuesday, Aug. 2, 2011 in Mankato, Minn. Ponder knows the Vikings brought in Donovan McNabb to start and though eager to learn from the veteran, he is anxious to take over as soon as possible. (AP Photo/Jim Mone)

Minnesota Vikings rookie quarterback Christian Ponder from Florida State works out during NFL football training camp, Tuesday, Aug. 2, 2011 in Mankato, Minn. Ponder knows the Vikings brought in Donovan McNabb to start and though eager to learn from the veteran, he is anxious to take over as soon as possible. (AP Photo/Jim Mone)

In this photo made taken Aug. 1, 2011, Minnesota Vikings first round draft pick, quarterback Christian Ponder out of Florida State, throws under the watchful eye of new Vikings head coach Leslie Frazier during NFL football training camp in Mankato, Minn. Though Ponder is eager to learn from new veteran quarterback Donovan McNabb, he wants to take over as soon as possible. (AP Photo/Jim Mone)

Minnesota Vikings rookie cornerback Devon Torrence looks on during a break at NFL football training camp, Tuesday, Aug. 2, 2011 in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings rookie wide receiver Dominic Johnson pulls in a pass during NFL football training camp, Tuesday, Aug. 2, 2011 in Mankato, Minn. (AP Photo/Jim Mone)

Minnesota Vikings defensive end Jared Allen takes a breather during NFL football training camp, Tuesday, Aug. 2, 2011 in Mankato, Minn. (AP Photo/Jim Mone)