IRVING, Texas -- The Dallas Cowboys have exercised the fifth-year option on Tyron Smith’s contract, according to a source, keeping the 2011 first-round pick with the team at least through 2015. The option will pay Smith more than $10 million and is presently guaranteed for injury, but it does not preclude the Cowboys and Smith working out a multi-year deal before it is fully guaranteed by the first day of the league year in 2015. The Cowboys took Smith with the ninth pick in the 2011 draft, and he has missed just one game in three seasons.
