Dallas Cowboys quarterback Tony Romo (9) warms up before an NFL preseason football game against the Houston Texans, Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/LM Otero)

Houston Texans' Ryan Griffin (84) is tackled by Dallas Cowboys defensive back J.J. Wilcox (27) during the first half of a preseason NFL football game, Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Houston Texans quarterback Case Keenum (7) eludes Dallas Cowboys nose tackle Sean Lissemore (95) during the first half of a preseason NFL football game Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Dallas Cowboys running back Joseph Randle (35) is tackled by Houston Texans' A.J. Bouye (34) and D.J. Swearinger (36) during the first half of a preseason NFL football game Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/LM Otero)

Houston Texan's running back Cierre Wood, left, stiff-arms Dallas Cowboys linebacker Caleb McSurdy (56) during the first half of a preseason NFL football game on Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Houston Texans wide receiver DeVier Posey (11) is taken down by Dallas Cowboys' Micah Pellerin (31), Ernie Sims (59), and J.J. Wilcox (27) during the first half of a preseason NFL football game Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Houston Texans quarterback Matt Schaub (8) works the sideline against the Dallas Cowboys during the first half of a preseason NFL football game Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/LM Otero)

Houston Texans running back Dennis Johnson (28) celebrates his 5-yard touchdown against the Dallas Cowboys with Ryan Griffin (84) during the first half of a preseason NFL football game Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/LM Otero)

Houston Texans running back Dennis Johnson (28) makes a 5-yard touchdown against the Dallas Cowboys during the first half of a preseason NFL football game, Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/LM Otero)

Houston Texans wide receiver Lestar Jean (18) makes a 27-yard touchdown over Dallas Cowboys cornerback B.W. Webb (20) during the first half of a preseason NFL football game Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Dallas Cowboys tight end James Hanna (84) is tackled by Houston Texans linebacker Sam Montgomery (57) during the first half of a preseason NFL football game Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Houston Texans safety Jawanza Starling (29) tries to bring down Dallas Cowboys wide receiver Cole Beasley (11) during the first half of a preseason NFL football game Thursday, Aug. 29, 2013, in Arlington, Texas. (AP Photo/Tony Gutierrez)