He signed as an undrafted free agent with the Cowboys in 2003. Beginning his career as a holder, Romo became the Cowboys' starting quarterback during the 2006 season. Serving as the team's primary starter from 2006 to 2015, he guided the Cowboys to four postseason appearances and was named to the Pro Bowl four times. Romo retired after the 2016 season, following a preseason back injury that caused him to lose his starting position to Dak Prescott. Upon retiring, he was hired by CBS Sports to become the lead color analyst for their NFL telecasts, teaming with Jim Nantz in the broadcast booth.