FILE - In this Nov. 22, 2009 file photo Cincinnati Bengals running back Larry Johnson(notes) catches a ball during warm-ups before an NFL football game against the Oakland Raiders in Oakland, Calif. Johnson lost his job with his former team, the Kansas City Chiefs, after he publicly questioned his coach and used gay slurs on Twitter. He is one of several athletes, celebrities and politicians who've discovered the pitfalls of taking such thoughts public on social networking.

Dallas Cowboys running back Felix Jones(notes) (28) scores a touchdown followed by Oakland Raiders cornerback Tyvon Branch(notes) (33) during the first half of an NFL football game on Thursday, Nov. 26, 2009, in Arlington, Texas. (AP Photo/Waco Tribune Herald, Jose Yau),

Dallas Cowboys wide receiver Miles Austin(notes) (19) scores a touchdown followed by Oakland Raiders safety Mike Mitchell(notes) (34) during the second half of an NFL football game on Thursday, Nov. 26, 2009, in Arlington, Texas.

Dallas Cowboys wide receiver Miles Austin(notes) (19) is tackled by Oakland Raiders cornerback Chris Johnson, bottom, as Raiders linebacker Sam Williams(notes) (54) looks on in the first half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas. Austin got up following the tackle and ran in for a touchdown that after review as nullifed by officials in the 24-7 Cowboys win.

Dallas Cowboys wide receiver Miles Austin(notes) (19) is tackled by Oakland Raiders cornerback Chris Johnson, bottom, as Raiders linebacker Sam Williams(notes) (54) looks on in the first half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas. Austin got up following the tackle and ran in for a touchdown that after review was nullifed by officials in the 24-7 Cowboys win.

Dallas Cowboys safety Gerald Sensabaugh(notes) (43) tackles Oakland Raiders tight end Zach Miller (80) following Miller's reception in the second half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas. The Cowboys won 24-7.

Dallas Cowboys linebacker Anthony Spencer(notes) (93) celebrates after sacking Oakland Raiders quarterback Bruce Gradkowski(notes) as defensive end Jason Hatcher(notes), behind, and defensive end Jay Ratliff(notes), back right, look on in the second half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas. The Cowboys won 24-7.

Dallas Cowboys tight end Jason Witten(notes), front, evades a tackle-attempt by Oakland Raiders cornerback Nnamdi Asomugha(notes) (21) in the second half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas. The Cowboys won 24-7.

Dallas Cowboys linebacker Anthony Spencer(notes) (93) sacks Oakland Raiders quarterback Bruce Gradkowski(notes) (5) in the second half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas. The Cowboys won 24-7.

Dallas Cowboys wide receiver Roy E. Williams (11) celebrates his touchdown with guard Leonard Davis(notes) (70) in the second half of an NFL football game against the Oakland Raiders, Thursday, Nov. 26, 2009, in Arlington, Texas. The Cowboys won 24-7.

ARLINGTON, TX - NOVEMBER 26: Wide receiver Johnnie Lee Higgins(notes) #15 of the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: Defensive tackle William Joseph(notes) #94 of the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: Running back Felix Jones(notes) #28 of the Dallas Cowboys runs for a touchdown against the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: Quarterback Tony Romo(notes) #9 of the Dallas Cowboys during play against the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: Quarterback Tony Romo(notes) #9 of the Dallas Cowboys during play against the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: Head coach Wade Phillips of the Dallas Cowboys during play against the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: Abigail Klein of the Dallas Cowboys Cheerleaders performs during the game against the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

Oakland Raiders wide receiver Louis Murphy(notes) (18) reaches unsuccessfully for a pass as Dallas Cowboys cornerback Mike Jenkins(notes) (21) defends in the second half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas. The Cowboys won 24-7.

Dallas Cowboys wide receiver Miles Austin(notes) (19) celebrates following his touchdown in the first half of an NFL football game against the Oakland Raiders, Thursday, Nov. 26, 2009, in Arlington, Texas. The Cowboys won 24-7.

Dallas Cowboys wide receiver Miles Austin(notes) (19) celebrates his touchdown with running back Marion Barber(notes) (24) in the first half of an NFL football game against the Oakland Raiders, Thursday, Nov. 26, 2009, in Arlington, Texas. The touchdown was later nullified.

ARLINGTON, TX - NOVEMBER 26: Joey Barnes of Daughtry performs at halftime during a game between the Oakland Raiders and the Dallas Cowboys at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: (L-R) Josh Steely, Chris Daughtry, Josh Paul, and Brian Craddock of Daughtry performs at halftime during a game between the Oakland Raiders and the Dallas Cowboys at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: Fans celebrate a touchdown against the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: Chris Daughtry of Daughtry performs at halftime during a game between the Oakland Raiders and the Dallas Cowboys at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

Oakland Raiders quarterback Bruce Gradkowski(notes) (5) throws a pass under pressure from Dallas Cowboys linebacker DeMarcus Ware(notes), bottom, as Raiders' Mario Henderson(notes) (75) looks on in the second half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas.

Oakland Raiders quarterback Bruce Gradkowski(notes) (5) scrambles out of pocket under pressure from Dallas Cowboys linebacker Anthony Spencer(notes) (93) in the second half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas.

Oakland Raiders wide receiver Darrius Heyward-Bey(notes) (12) prepares to grab a touchdown pass as Dallas Cowboys cornerback Alan Ball(notes) (20) defends in the second half of an NFL football game, Thursday, Nov. 26, 2009, in Arlington, Texas.

Oakland Raiders tight end Tony Stewart(notes), left, and offensive tackle Robert Gallery(notes) (76) celebrate with wide receiver Darrius Heyward-Bey(notes), top, following his touchdown-reception in the second half of an NFL football game against the Dallas Cowboys, Thursday, Nov. 26, 2009, in Arlington, Texas.

ARLINGTON, TX - NOVEMBER 26: Wide receiver Miles Austin(notes) #19 of the Dallas Cowboys is tackled by Chris Johnson #37 of the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

ARLINGTON, TX - NOVEMBER 26: Running back Felix Jones(notes) #28 of the Dallas Cowboys runs the ball against Tyvon Branch(notes) #33 of the Oakland Raiders at Cowboys Stadium on November 26, 2009 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)