Dallas Cowboys wide receiver Dwayne Harris (17) makes a touchdown reception against the St. Louis Rams during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams quarterback Sam Bradford warms up before a preseason football game against the Dallas Cowboys, Saturday, Aug. 25, 2012 in Arlington. (AP Photo/LM Otero)

Dallas Cowboys quarterback Tony Romo warms up before a preseason football game against the St. Louis Rams, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys quarterback Tony Romo warms up before a preseason football game against the St. Louis Rams, Saturday, Aug. 25, 2012 in Arlington. (AP Photo/LM Otero)

St. Louis Rams head coach Jeff Fisher watches his team warm up before a preseason football game against the Dallas Cowboys, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys quarterback Tony Romo warms up before a preseason football game against the St. Louis Rams, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams quarterback Sam Bradford (8) warms up during preseason football game against the Dallas Cowboys, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys quarterback Tony Romo throws the ball against the St. Louis Rams during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys running back DeMarco Murray (29) is tackled by St. Louis Rams defensive tackle Michael Brockers (90) during the first half of a preseason football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

St. Louis Rams defensive back Quintin Mikell (27) and cornerback Janoris Jenkins (21) tackle Dallas Cowboys tight end John Phillips (89) during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys running back DeMarco Murray (29) is tackled by St. Louis Rams defensive back Quintin Mikell (27) during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams quarterback Sam Bradford (8) passes the ball against the Dallas Cowboys during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys running back DeMarco Murray (29) is defended by St. Louis Rams linebacker James Laurinaitis during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys running back DeMarco Murray (29) is tackled by St. Louis Rams defensive tackle Michael Brockers (90) during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys wide receiver Dwayne Harris (17) celebrates his touchdown reception against the St. Louis Rams with Mackenzy Bernadeau (73) during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams quarterback Sam Bradford (8) looks to hand the ball off against the Dallas Cowboys during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys defensive end Jason Hatcher (97) celebrates sacking St. Louis Rams quarterback Sam Bradford during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys defensive end Jason Hatcher (97) sacks St. Louis Rams quarterback Sam Bradford (8) during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys defensive end Jason Hatcher (97) celebrates sacking St. Louis Rams quarterback Sam Bradford during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys defensive end Jason Hatcher (97) sacks St. Louis Rams quarterback Sam Bradford (8) during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys wide receiver Dwayne Harris scores a touchdown against the St. Louis Rams during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys quarterback Tony Romo hands the ball off against the St. Louis Rams during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys wide receiver Dwayne Harris (17) and wide receiver Dez Bryant (88) celebrate Harris' touchdown against the St. Louis Ram during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys wide receiver Dwayne Harris (17) celebrates his touchdown against the St. Louis Rams during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams kicker Greg Zuerlein makes a field goal against the Dallas Cowboys during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys wide receiver Dwayne Harris (17) and quarterback Tony Romo celebrate their touchdown against the St. Louis Rams during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys quarterback Kyle Orton (18) passes the ball against the St. Louis Rams during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys head coach Jason Garrett watches action against the St. Louis Rams during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys quarterback Kyle Orton (18) looks to hand the ball of against the St. Louis Rams during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

St. Louis Rams running back Isaiah Pead (24) gets past Dallas Cowboys linebacker Alex Albright (55) and defensive back Mana Silva (36) during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams head coach Jeff Fisher watches action against the Dallas Cowboys during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys defensive tackle Josh Brent (92) tackles St. Louis Rams wide receiver Danny Amendola during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys defensive back Gerald Sensabaugh (43) tackles St. Louis Rams running back Daryl Richardson (26) during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys wide receiver Dwayne Harris (17) is tackled by St. Louis Rams cornerback Trumaine Johnson (22) during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys running back Lance Dunbar (25) gets past St. Louis Rams running back Daryl Richardson (26) during the second half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys defensive coordinator Rob Ryan and others point to the big screen against the St. Louis Rams during the second half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams quarterback Kellen Clemens (10) passes against the Dallas Cowboys during the second half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

St. Louis Rams wide receiver Austin Pettis (18) scores a touchdown as Dallas Cowboys cornerback Lionel Smith (41) and guard Bryan Mattison (67) move in during the second half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams running back Isaiah Pead is tackled by Dallas Cowboys linebacker Orie Lemon (58) during the second half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)

St. Louis Rams defensive back Kendric Burney (42) and Dallas Cowboys wide receiver Dwayne Harris (17) meet on the field following a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys quarterback Tony Romo (9) leaves the field following a preseason NFL football game against the St. Louis Rams, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams head coach Jeff Fisher, left, and Dallas Cowboys head coach Jason Garrett meet following a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

Dallas Cowboys quarterback Tony Romo (9) leaves the field following a preseason NFL football game against the St. Louis Rams, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams fullback Ovie Mughelli (34) is tackled by Dallas Cowboys linebacker Orie Lemon (58) as Rams center Tim Barnes (61) helps during the second half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade)

St. Louis Rams fullback Ovie Mughelli (34) scores a touchdown as Dallas Cowboys safety Eddie Whitley (38) defends during the second half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/LM Otero)