Travis Frederick didn't fully understand the business of football when the Dallas Cowboys drafted their center six years ago and made him an instant starter. Eventually, the four-time Pro Bowler saw what Dallas was trying to build by using first-round picks on offensive linemen three times in four drafts after never having taken a blocker that high in 22 years under owner and general manager Jerry Jones. The Cowboys have become consistent winners behind the line with the NFL's highest salary cap figure.