Dallas Cowboys quarterback Tony Romo (9) greets his son, Hawkins before a preseason NFL football game Minnesota Vikings Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys running back Joseph Randle (21) runs the ball against the Minnesota Vikings during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys quarterback Tony Romo (9) calls a play against the Minnesota Vikings during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Minnesota Vikings quarterback Teddy Bridgewater (5) hands the ball lot running back Jerick McKinnon (31) during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Minnesota Vikings quarterback Teddy Bridgewater (5) looks to pass against the Dallas Cowboys during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys wide receiver Terrance Williams (83) celebrates his touchdown against the Minnesota Vikings with guard Ronald Leary (65) during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys wide receiver Terrance Williams (83) celebrates his touchdown against the Minnesota Vikings during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys wide receiver Terrance Williams (83) gets past Minnesota Vikings strong safety Robert Blanton (36) to score a touchdown during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys wide receiver Lucky Whitehead (13) scores a touchdown against the Minnesota Vikings during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys strong safety Barry Church (42) celebrates a tackle against the Minnesota Vikings during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Minnesota Vikings wide receiver Stefon Diggs (14) is tackled by Dallas Cowboys running back Lance Dunbar (25) during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys cornerback Brandon Carr (39) makes an interception over Minnesota Vikings wide receiver Stefon Diggs (14) during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Roger Steinman)

Dallas Cowboys cornerback Brandon Carr (39) is unable to intercept a ball intended for Minnesota Vikings wide receiver Stefon Diggs (14) during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys cornerback Brandon Carr (39) celebrates his interception over Minnesota Vikings wide receiver Stefon Diggs with fullback Tyler Clutts (44) during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Roger Steinman)

Dallas Cowboys quarterback Dustin Vaughan (10) passes the ball as Minnesota Vikings defensive end Justin Trattou (94) defends during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Minnesota Vikings tight end Chase Ford (86) celebrates with guard David Yankey (66) after making a reception for a two-point conversion against the Dallas Cowboys during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Minnesota Vikings tight end Chase Ford (86) catches a pass for a two-point conversion against the Dallas Cowboys during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Minnesota Vikings running back Dominique Williams (43) reacts after scoring a touchdown against the Dallas Cowboys during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Minnesota Vikings defensive tackle Tom Johnson (92) sacks Dallas Cowboys quarterback Dustin Vaughan (10) during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Minnesota Vikings wide receiver Adam Thielen (19) can't make the catch over Dallas Cowboys cornerback Morris Claiborne (24) during the first half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Minnesota Vikings running back Dominique Williams (43) scores a touchdown as Dallas Cowboys cornerback Rod Sweeting (30) defends during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Minnesota Vikings running back Dominique Williams (43) is tackled by Dallas Cowboys linebacker Jasper Brinkley (54) during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Minnesota Vikings running back Joe Banyard (23) celebrates his touchdown against the Dallas Cowboys during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)

Minnesota Vikings running back Joe Banyard (23) runs past Dallas Cowboys cornerback Joel Ross (29) to score a touchdown during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Dallas Cowboys quarterback Jameill Showers (7) fumbles the ball Minnesota Vikings middle linebacker Audie Cole (57) recovers during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Minnesota Vikings running back Joe Banyard (23) and quarterback Taylor Heinicke (6) celebrate their touchdown against the Dallas Cowboys during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Dallas Cowboys quarterback Jameill Showers (7) is sacked by Minnesota Vikings defensive end Leon Mackey (78) during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Minnesota Vikings running back Joe Banyard (23) and quarterback Taylor Heinicke (6) celebrate their touchdown against the Dallas Cowboys during the second half of a preseason NFL football game Saturday, Aug. 29, 2015, in Arlington, Texas. (AP Photo/Brandon Wade)