NFL football player Tony Romo and wife, Candice Crawford, arrive on the red carpet for the annual White House Correspondents Association Dinner in Washington, U.S., April 30, 2016. REUTERS/Jonathan Ernst 

NFL football player Tony Romo and wife, Candice Crawford, arrive on the red carpet for the annual White House Correspondents Association Dinner in Washington, U.S., April 30, 2016. REUTERS/Jonathan Ernst 

Dallas Cowboys quarterback Tony Romo and his wife, Candice, arrive for the annual White House Correspondents' Association dinner in Washington April 25, 2015. REUTERS/Jonathan Ernst

Dallas Cowboys quarterback Tony Romo and his wife, Candice, arrive for the annual White House Correspondents' Association dinner in Washington April 25, 2015. REUTERS/Jonathan Ernst

Reporter Candice Crawford and NFL football player Tony Romo arrive at the 50th Annual Academy of Country Music Awards in Arlington, Texas April 19, 2015. REUTERS/Mike Stone 

Reporter Candice Crawford and NFL football player Tony Romo arrive at the 50th Annual Academy of Country Music Awards in Arlington, Texas April 19, 2015. REUTERS/Mike Stone 

Dallas Cowboys quarterback Tony Romo throws a football to show co-host Luke Bryan (not pictured) before introducing a performance by Dieks Bentley at the 50th Annual Academy of Country Music Awards in Arlington, Texas April 19, 2015. REUTERS/Mike Blake 

Dallas Cowboys quarterback Tony Romo takes the stage to introduce a performance by Dieks Bentley at the 50th Annual Academy of Country Music Awards in Arlington, Texas April 19, 2015. REUTERS/Mike Blake 

Dallas Cowboys' Tony Romo (L) throws a pass against Jacksonville Jaguars' Ryan Davis during their NFL football game at Wembley Stadium in London, November 9, 2014. REUTERS/Suzanne Plunkett (BRITAIN - Tags: SPORT FOOTBALL) 

Dallas Cowboys' Tony Romo throws a pass against the Jacksonville Jaguars during their NFL football game at Wembley Stadium in London, November 9, 2014. REUTERS/Suzanne Plunkett (BRITAIN - Tags: SPORT FOOTBALL) 

NFL football player Tony Romo and wife, Candice Crawford, arrive on the red carpet at the annual White House Correspondents' Association Dinner in Washington, May 3, 2014. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS SPORT FOOTBALL MEDIA ENTERTAINMENT SOCIETY)

NFL football player Tony Romo and wife, Candice Crawford, arrive on the red carpet at the annual White House Correspondents' Association Dinner in Washington, May 3, 2014. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS SPORT FOOTBALL MEDIA ENTERTAINMENT SOCIETY)

Dallas Cowboys quarterback Tony Romo (9) passes against the San Diego Chargers during their NFL football game in San Diego, California September 29, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (9) yells at an official over what he believed to be a missed pass interference call against the San Diego Chargers during their NFL football game in San Diego, California September 29, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (9) is chased by San Diego Chargers free safety Eric Weddle (32) as he runs for a first down in the 4th quarter during their NFL football game in San Diego, California September 29, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (9) passes against the San Diego Chargers during their NFL football game in San Diego, California September 29, 2013.REUTERS/Mike Blake (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (R) is sacked by San Diego Chargers linebacker Larry English (C) and Manti Te'o during their NFL football game in San Diego, California September 29, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo passes against the San Diego Chargers during their NFL football game in San Diego, California September 29, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: SPORT FOOTBALL) 

San Diego Chargers inside linebacker Manti Te'o (50) chases down Dallas Cowboys quarterback Tony Romo (9) to help with a first half during their NFL football game in San Diego, California September 29, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (9) passes usder pressure from San Diego Chargers outside linebacker Dwight Freeney (93) during their NFL football game in San Diego, California September 29, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys running back DeMarco Murray (2nd L) fumbles after being hit by St. Louis Rams defensive end Robert Quinn (L) and defensive end William Hayes (C) as quarterback Tony Romo and linebacker James Laurinaitis (R) are near in the second half of their NFL football game in Arlington, Texas September 22, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (L) looks down field as St. Louis Rams defensive tackle Matt Conrath rushes in the first half of their NFL football game in Arlington, Texas September 22, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys running back DeMarco Murray hurdles offensive tackle Doug Free (on ground) as center Travis Frederick (72) blocks and quarterback Tony Romo (9) watches in the second half of their NFL football game against the St. Louis Rams in Arlington, Texas September 22, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo signals to his receivers against the St. Louis Rams in the second half of their NFL football game in Arlington, Texas September 22, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo passes against the St. Louis Rams in the second half of their NFL football game in Arlington, Texas September 22, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo talks with wide receiver Dez Bryant (R) in the second half of their NFL football game against the St. Louis Rams in Arlington, Texas September 22, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (L) smiles as he sits next to quarterback Kyle Orton in the second half of their NFL football game against the St. Louis Rams in Arlington, Texas September 22, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo is hit by St. Louis Rams defensive tackle Michael Brockers (R) in the second half of their NFL football game in Arlington, Texas September 22, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (L) passes as center Travis Frederick blocks St. Louis Rams defensive tackle Michael Brockers (back) in the first half of their NFL football game in Arlington, Texas September 22, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo passes during the second half of the Kansas City Chiefs' win in their NFL football game in Kansas City, Missouri September 15, 2013. REUTERS/Dave Kaup (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys wide receiver Dez Bryant can't catch a quarterback Tony Romo pass defended by Kansas City Chiefs defensive back Quintin Demps during the second half of the Chiefs' win in their NFL football game in Kansas City, Missouri September 15, 2013. REUTERS/Dave Kaup (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo throws against the Kansas City Chiefs during the first half of their NFL football game in Kansas City, Missouri September 15, 2013. REUTERS/Dave Kaup (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys wide receiver Dez Bryant hauls in a quarterback Tony Romo pass for a touchdown against Kansas City Chiefs cornerback Brandon Flowers during the first half of their NFL football game in Kansas City, Missouri September 15, 2013. REUTERS/Dave Kaup (UNITED STATES - Tags: SPORT FOOTBALL) 

(L-R) Dallas Cowboys quarterback Tony Romo, defensive end DeMarcus Ware along with New York Giants defensive end Justin Tuck, wide receiver Hakeem Nicks and offensive tackle Will Beatty pray following their NFL football game in Arlington, Texas September 8, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL RELIGION TPX IMAGES OF THE DAY) 

Dallas Cowboys quarterback Tony Romo and New York Giants quarterback Eli Manning talk following their NFL football game in Arlington, Texas September 8, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

New York Giants defensive end Jason Pierre-Paul (R) rushes Dallas Cowboys quarterback Tony Romo as offensive tackle Doug Free (68) blocks in the second half of their NFL football game in Arlington, Texas September 8, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

New York Giants defensive end Jason Pierre-Paul (L) celebrates after sacking Dallas Cowboys quarterback Tony Romo (R) next to Cowboys guard Ronald Leary (2nd L) and Giants defensive tackle Cullen Jenkins in the second half of their NFL football game in Arlington, Texas September 8, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo is helped from the field after being injured against the New York Giants in the first half of their NFL football game in Arlington, Texas September 8, 2013. REUTERS/Mike Stone (UNITED STATES) 

Dallas Cowboys quarterback Tony Romo (C) is helped off the field after being injured as wide receiver Dez Bryant (L) talks to him in the first half of their NFL football game against the New York Giants in Arlington, Texas September 8, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (9) lies on the field as his teammates watch after getting injured against the New York Giants in the first half of their NFL football game in Arlington, Texas September 8, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (C) looks down field as tight end Jason Witten (R) blocks New York Giants defensive end Justin Tuck in the first half of their NFL football game in Arlington, Texas September 8, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (9) passes against the New York Giants in the first half of their NFL football game in Arlington, Texas September 8, 2013. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo throws during warm-ups before the Cowboys' NFL Hall of Fame Game against the Miami Dolphins in Canton, Ohio August 4, 2013. REUTERS/Aaron Josefczk (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo smiles as he walks the field prior to the Cowboys NFL/Hall of Fame Game against the Miami Dolphins in Canton, Ohio August 4, 2013. REUTERS/Aaron Josefczk(UNITED STATES - Tags: SPORT FOOTBALL) 

Washington Redskins linebacker Ryan Kerrigan (91) and linebacker London Fletcher celebrate after sacking Dallas Cowboys quarterback Tony Romo (L) during the second half of their NFL football game in Landover, Maryland, December 30, 2012. REUTERS/Jonathan Ernst (UNITED STATES - Tags: SPORT FOOTBALL) 

Washington Redskins linebacker Rob Jackson salutes the crowd after Jackson intercepted Dallas Cowboys quarterback Tony Romo (not in photo) late in the second half of their NFL football game in Landover, Maryland December 30, 2012. The Redskins defeated Dallas for first place in the NFC East and will continue on to the NFL playoffs next week. REUTERS/Gary Cameron (UNITED STATES - Tags: SPORT FOOTBALL) 

Washington Redskins linebacker Rob Jackson is mobbed by teammates Stephen Bowen (L) and Perry Riley after Jackson intercepted Dallas Cowboys quarterback Tony Romo (not in photo) late in the second half of their NFL football game in Landover, Maryland December 30, 2012. The Redskins defeated Dallas for first place in the NFC East and will continue on to the NFL playoffs next week. REUTERS/Gary Cameron (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (9) leaves the field after greeting Washington Redskins quarterback Robert Griffin III (R) at the end of their NFL football game in Landover, Maryland December 30, 2012. The Washington Redskins defeated the Dallas Cowboys 28-18 on Sunday to claim the NFC East crown for the first time since 1999 and deny their bitter rivals a spot in the postseason. REUTERS/Jonathan Ernst (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (R) is sacked by Washington Redskins linebacker London Fletcher (C) in the second half of their NFL football game in Landover, Maryland December 30, 2012. REUTERS/Gary Cameron (UNITED STATES - Tags: SPORT FOOTBALL TPX IMAGES OF THE DAY) 

Dallas Cowboys quarterback Tony Romo (9) passes against the Washington Redskins during the first half of their NFL football game in Landover, Maryland, December 30, 2012. REUTERS/Jonathan Ernst (UNITED STATES - Tags: SPORT FOOTBALL) 

Referee Walt Anderson helps Dallas Cowboys quarterback Tony Romo (9) up after a hit by the Washington Redskins during the first half of their NFL football game in Landover, Maryland, December 30, 2012. REUTERS/Jonathan Ernst (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo (left) takes a hit from Washington Redskins linebacker Perry Riley (56) after a pass during the first half of their NFL football game in Landover, Maryland, December 30, 2012. REUTERS/Jonathan Ernst (UNITED STATES - Tags: SPORT FOOTBALL) 

Washington Redskins cornerback Richard Crawford (L) intercepts a Dallas Cowboys quarterback Tony Romo (not pictured) pass in the first half of their NFL football game in Landover, Maryland December 30, 2012. Cowboys' intended receiver Kevin Ogletree is at right. REUTERS/Gary Cameron (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys tight end Jason Witten (L) and his team mates celebrate a touchdown reception from quarterback Tony Romo (not pitcured) during the first half of their NFL football game against the Washington Redskins in Landover, Maryland December 30, 2012. REUTERS/Gary Cameron (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys tight end Jason Witten celebrates a touchdown reception from quarterback Tony Romo (not pictured) in the first half of their NFL football game against the Washington Redskins in Landover, Maryland December 30, 2012. REUTERS/Gary Cameron (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys starting quarterback Tony Romo blows on his hands to keep them warm during pre-game drills before their NFL football game against the Washington Redskins in Landover, Maryland December 30, 2012. REUTERS/Gary Cameron (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo passes against the New Orleans Saints in the first half of their NFL football game in Arlington, Texas December 23, 2012. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo celebrates a touchdown pass to wide receiver Dez Bryant (not seen) against the New Orleans Saints in the first half of their NFL football game in Arlington, Texas December 23, 2012. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo and guard Mackenzy Bernadeau shake hands as the walk off the field after beating the Pittsburgh Steelers in their NFL football game in Arlington, Texas December 16, 2012. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL) 

Dallas Cowboys quarterback Tony Romo is sacked by Pittsburgh Steelers linebacker Lawrence Timmons (R) in the second half of their NFL football game in Arlington, Texas December 16, 2012. REUTERS/Mike Stone (UNITED STATES - Tags: SPORT FOOTBALL)