DALLAS COWBOYSTony Romo through the yearsTony Romo went from an undrafted free agent out of Eastern Illinois to the Dallas Cowboys' all-time leading passer. Here's a look back at some of the key moments from the four-time Pro Bowl selection's playing career.Matthew Emmons, Matthew Emmons-USA TODAY SportsRomo only played one game in the 2016 season.Bill Streicher, USA TODAY SportsRomo's anticipated comeback for the 2016 season was thrown off course after he suffered a broken bone in his back in the Cowboys' third preseason game against the Seattle Seahawks. Dak Prescott would take over the starting role and never relinquish it in leading the Cowboys to a 13-3 record and the No. 1 seed in the NFC.Troy Wayrynen, USA TODAY SportsFans holds a sign showing support for Romo.Andrew Weber, USA TODAY SportsOne week after making his return from injured reserve in 2015, Romo was knocked out for the season in a Thanksgiving game against the Carolina Panthers.Jerome Miron, USA TODAY SportsAn injured Romo during the 2015 season.Matthew Emmons, USA TODAY SportsRomo during his time at Eastern Illinois.HandoutRomo led the Cowboys to a 12-4 record in 2014, but Dallas came up short in a controversial 26-21 loss to the Green Bay Packers.Andrew Weber, USA TODAY SportsRomo was awarded the Galloping Gobbler award for his performance against the Buccaneers on Thanksgiving in 2006.Caleb Simpson, USA TODAY SportsRomo threw for a career-high 506 yards against the Denver Broncos in 2013, but he threw an interception in the final minute that set up the Broncos' game-winning field goal in a 51-48 shootout.Matthew Emmons, Matthew Emmons-USA TODAY SportsRomo signs an autograph for a fan at the 2008 Pro Bowl.Paul Sakuma, APRomo fumbled the snap on what would have been a go-ahead field goal in the 2007 NFC wild card playoff against the Seahawks.John Froschauer, APRomo before a game against the Giants in 2006.Robert Deutsch, USA TODAY SportsRomo celebrates a touchdown with Terrell Owens in 2007.Michael Mulvey, Dallas Morning NewsRomo during training camp in 2010.Robert Hanashiro, USA TODAYRomo passes against the Patriots in 2011.Stew Milne, USA TODAY SportsRomo and his wife walk the red carpet together before the 4th Annual National Football League Honors in 2015.Jessie Wardarski /The Republic, Jessie Wardarski/The RepublicRomo with then-girlfriend Jessica Simpson in 2008.Tony Gutierrez, AP