Oakland Raiders running back Marshawn Lynch (24) takes a hand off from quarterback Derek Carr (4) during warm ups before a preseason NFL football game against the Dallas Cowboys on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys running back Ezekiel Elliott (21) takes a hand off from quarterback Dak Prescott, rear, during warm ups before a preseason NFL football game against the Oakland Raiders on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Dallas Cowboys cornerback Orlando Scandrick (32) pressures the pocket as Oakland Raiders quarterback Derek Carr (4) throws a pass in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys running back Ezekiel Elliott (21) runs the ball as Oakland Raiders defensive end Khalil Mack (52) gives chase in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders cornerback TJ Carrie (38) gives chase as Dallas Cowboys running back Ezekiel Elliott (21) runs the ball through the line of scrimmage in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Dallas Cowboys running back Ezekiel Elliott (21) signals first down after a run against the Oakland Raiders in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Oakland Raiders linebacker Tyrell Adams (58) puts a hit on Dallas Cowboys tight end Jason Witten (82) as Witten gains extra yardage after catching a pass in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys quarterback Dak Prescott (4) throws a pass under pressure from Oakland Raiders linebacker Bruce Irvin (51) in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys running back Ezekiel Elliott (21) fights for extra yardage as Oakland Raiders linebacker Jelani Jenkins (53) makes the stop in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys defensive end Benson Mayowa (93) pressures as Oakland Raiders quarterback Derek Carr (4) throws a pass in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Dallas Cowboys punter Chris Jones (6) holds as place kicker Dan Bailey (5) kicks a field goal in the first half of a preseason NFL football game against the Oakland Raiders on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Oakland Raiders running back Marshawn Lynch (24) runs the ball under pressure from Dallas Cowboys defensive end DeMarcus Lawrence (90) in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders running back Jalen Richard (30) runs the ball as Dallas Cowboys safety Jeff Heath (38) and defensive end DeMarcus Lawrence (90) combine to make the stop in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders wide receiver Cordarrelle Patterson (84) catches a touchdown pass between Dallas Cowboys' Jeff Heath (38) and Nolan Carroll II, right, in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Oakland Raiders wide receiver Amari Cooper, top left, and Cordarrelle Patterson (84) celebrate a touchdown catch by Patterson in the first half of a preseason NFL football game against the Dallas Cowboys on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Dallas Cowboys' Zack Martin, left, Travis Frederick (72) and tight end Jason Witten (82) celebrate a touchdown catch by Witten in the first half of a preseason NFL football game against the Oakland Raiders on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys running back Darren McFadden (20) runs the ball as Oakland Raiders defensive lineman Denico Autry (96) gives chase in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys tight end Jason Witten (82) catches a pass for a touchdown in front of Oakland Raiders safety Karl Joseph (42) in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Dallas Cowboys linebacker Jaylon Smith (54) celebrates tackling Oakland Raiders running back DeAndre Washington after a short run in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Oakland Raiders wide receiver Amari Cooper catches a pass in front of Dallas Cowboys cornerback Anthony Brown (30) and head sot the end zone for a touchdown in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders tight end Jared Cook (87) looks for running room after catching a pass against Dallas Cowboys safety Byron Jones (31) in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders punter Marquette King (7) holds the ball as place kicker Giorgio Tavecchio (2) kicks an extra point in the first half of a preseason NFL football game against the Dallas Cowboys on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys quarterback Dak Prescott (4) is sacked by Oakland Raiders defensive tackle Treyvon Hester (90) in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders safety Karl Joseph (42) attempts to stop Dallas Cowboys tight end Jason Witten (82) as Witten gains yardage after a catch in the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Oakland Raiders quarterback EJ Manuel (3) throws a pass as running back DeAndre Washington (33) helps against pressure from Dallas Cowboys safety Robert Blanton (36) during the first half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Dallas Cowboys' Dak Prescott (4) throws a pass in the first half of a preseason NFL football game against the Oakland Raiders on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys quarterback Cooper Rush (7) throws a pass in the second half of a preseason NFL football game against the Oakland Raiders on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders linebacker Jelani Jenkins (53) attempts the stop as Dallas Cowboys tight end James Hanna (84) fights for extra yardage after catching a pass in the second half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders running back Elijah Hood (34) breaks a tackle attempt by Dallas Cowboys linebacker Mark Nzeocha (53) in the second half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys' Cole Beasley (11) talks with running back Ezekiel Elliott, right, on the sideline in the second half of a preseason NFL football game against the Oakland Raiders on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Dallas Cowboys quarterback Cooper Rush (7) runs the ball for a first down as Oakland Raiders linebacker James Cowser (47) attempts the stop in the second half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys running back Alfred Morris (46) runs the ball fighting off a tackle attempt by Oakland Raiders safety Rickey Jefferson (25) in the second half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders running back Marshawn Lynch (24) watches play from the sideline in the second half of a preseason NFL football game against the Dallas Cowboys on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders safety Shalom Luani (26) dives to make the stop against Dallas Cowboys running back Alfred Morris in the second half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys safety Robert Blanton (36) breaks up a pass intended for Oakland Raiders wide receiver Keon Hatcher, rear, in the end zone late in the second half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Dallas Cowboys running back Ronnie Hillman (34) runs past Oakland Raiders cornerback Breon Borders (31) and linebacker Najee Harris (48) into the end zone for a touchdown in the second half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Oakland Raiders cornerback Breon Borders (31) is unable to stop Dallas Cowboys wide receiver Lance Lenoir (14) from sprinting into the end zone after catching a pass for a touchdown in the second half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Oakland Raiders quarterback Connor Cook (18) drops back to hand the ball off in the second half of a preseason NFL football game against the Dallas Cowboys on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Dallas Cowboys defensive end Lewis Neal (66) sacks Oakland Raiders quarterback Connor Cook (18) in the second half of a preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)

Dallas Cowboys head coach Jason Garrett, left, and Oakland Raiders head coach Jack Del Rio, right, talk after their preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)

Oakland Raiders quarterback Derek Carr (4) and Dallas Cowboys quarterback Dak Prescott, right, greet each other on the field after their preseason NFL football game, Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Michael Ainsworth)