Dallas Cowboys wide receiver Roy E. Williams (11) celebrates his two-yard touchdown run in the second quarter of an NFL football game against the Minnesota Vikings, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)

Minnesota Vikings running back Adrian Peterson (28) runs against Dallas Cowboys in the second quarter of their NFL football game, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy King)

Dallas Cowboys quarterback Tony Romo (9) runs past Minnesota Vikings linebacker Chad Greenway (52) in the first quarter of their NFL football game Sunday, Oct. 17, 2010 in Minneapolis. (AP Photo/Andy King)

Fans watch warm ups before an NFL football game between the Minnesota Vikings and the Dallas Cowboys Sunday, Oct. 17, 2010 in Minneapolis.(AP Photo/Andy King)

Dallas Cowboys wide receiver Miles Austin (19) is brought down after a short gain in the first quarter in NFL football game between the Vikings and the Dallas Cowboys, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)

Dallas Cowboys wide receiver Roy E. Williams (11) as Cowboys Miles Austin jumps over celebrating Williams touchdown in the first quarter of their NFL football game Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy King)

Dallas Cowboys running back Felix Jones (28) looks for running room during the first quarter of an NFL football game between the Minnesota Vikings and the Dallas Cowboys on Sunday, October 17, 2010 in Minneapolis. (AP Photo/Andy Blenkush)

Dallas Cowboys quarterback Tony Romo (9) dives for yardage during the first quarter of an NFL football game between the Minnesota Vikings and the Dallas Cowboys on Sunday, October 17, 2010 in Minneapolis. (AP Photo/Andy Blenkush)

Dallas Cowboys cornerback Mike Jenkins, left, breaks up a Minnesota Vikings' Brett Favre pass intended for wide receiver Percy Harvin in the second quarter of an NFL football game Sunday, Oct. 17, 2010, in Minneapolis. Jenkins was called for pass interference on the play. (AP Photo/Jim Mone)

Dallas Cowboys quarterback Tony Romo (9) races for 14-yards on a drive during the second quarter of an NFL football game between the Minnesota Vikings and the Cowboys Sunday, Oct. 17, 2010, in Minneapolis. The Cowboys scored later on a drive. (AP Photo/Jim Mone)

Cheerleaders before an NFL football game between the Minnesota Vikings and the Dallas Cowboys Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)

Dallas Cowboys punter Mat McBriar (1) kicks during an NFL football game between the Minnesota Vikings and the Cowboys Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)

Minnesota Vikings quarterback Brett Favre (4) during an NFL football game between the Vikings and the Dallas Cowboys Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)

Dallas Cowboys quarterback Tony Romo (9) and center Andre Gurode (65) during an NFL football game between the Minnesota Vikings and the Cowboys Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)

Minnesota Vikings linebacker Ben Leber (51) drags down Dallas Cowboys running back Felix Jones (28) during the second quarter of an NFL football game, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy Blenkush)

Dallas Cowboys quarterback Tony Romo (9) throws as Minnesota Vikings safety Husain Abdullah (39) comes in during an NFL football game Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)

Dallas Cowboys wide receiver Roy E. Williams (11) celebrates after scoring a touchdown as teammate Miles Austin jumps over him during the first quarter of their NFL football game against the Minnesota Vikings, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy King)

Minnesota Vikings linebacker E.J. Henderson (56) celebrates his interception with Vikings linebacker Chad Greenway (52) during the fourth quarter of an NFL football game against the Dallas Cowboys on Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy Blenkush)

Dallas Cowboys wide receiver Dez Bryant (88) catches a 31-yard touchdown in front of Minnesota Vikings cornerback Lito Sheppard (29) in the fourth quarter of their NFL football game Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy King)

Minnesota Vikings running back Adrian Peterson (28) celebrates his third quarter touchdown during their NFL football game against the Dallas Cowboys, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy King)

Dallas Cowboys cornerback Alan Ball (20) breaks up a pass into the end zone to Minnesota Vikings wide receiver Randy Moss in the fourth quarter of an NFL football game, Sunday, Oct. 17, 2010, in Minneapolis. The Vikings won 24-21. (AP Photo/Jim Mone)

Dallas Cowboys in the fourth quarter of an NFL football game between the Minnesota Vikings and the Cowboys Sunday, Oct. 17, 2010, in Minneapolis. The Vikings won 24-21. (AP Photo/Jim Mone)

Vikings cheerleaders in an NFL football game between the Minnesota Vikings and the Cowboys Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)

Minnesota Vikings head coach Brad Childress, right, and defensive coordinator Leslie Frazier talk on the sidelines during an NFL football game between the Vikings and the Dallas Cowboys, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy Blenkush)

Minnesota Vikings linebacker E.J. Henderson (56) runs after intercepting a pass in the fourth quarter during the NFL football game against the Dallas Cowboys, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy King)

Dallas Cowboys quarterback Tony Romo leaves the field after the Cowboys lost to the Minnesota Vikings 24-21 during their NFL football game, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)

Minnesota Vikings running back Adrian Peterson (28) runs in his third quarter touchdown, with blocking by Vikings tight end Visanthe Shiancoe (81), past Dallas Cowboys' Keith Brooking (51), Alan Ball (20) and Gerald Sensabaugh (43) during their NFL football game, Sunday, Oct. 17, 2010, in Minneapolis. The Vikings won 24-21. (AP Photo/Andy King)

Minnesota Vikings wide receiver Percy Harvin (12) runs up the middle as Dallas Cowboys safety Gerald Sensabaugh (43) closes in for a tackle during an NFL football game, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy Blenkush)

Minnesota Vikings quarterback Brett Favre (4) throws during the NFL football game against the Dallas Cowboys Sunday, Oct. 17, 2010 in Minneapolis.(AP Photo/Andy King)

Minnesota Vikings running back Adrian Peterson (28) in an NFL football game between the Vikings and the Dallas Cowboys Sunday, Oct. 17, 2010, in Minneapolis. Also shown Cowboys safety Gerald Sensabaugh (43). (AP Photo/Jim Mone)

Minnesota Vikings quarterback Brett Favre (4) pumps his fist after a Vikings first down late in the fourth quarter during an NFL football game between the Vikings and the Dallas Cowboys, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Andy Blenkush)

Dallas Cowboys head coach Wade Phillips leaves the field after the Minnesota Vikings beat the Cowboys 24-21 in an NFL football game, Sunday, Oct. 17, 2010, in Minneapolis. (AP Photo/Jim Mone)