Cowboys sign draft picks Dak Prescott, Charles Tapper

The Dallas Cowboys on Tuesday made it official with both of their fourth-round draft picks.

Dallas signed quarterback Dak Prescott and defensive end Charles Tapper, the team announced.

Prescott (taken No. 135 overall) looms as a potential long-term replacement for Tony Romo. The former Mississippi State star is the first quarterback taken by the Cowboys since Stephen McGee in the fourth round back in 2009. Prescott will battle Kellen Moore for the No. 2 job, offering the Cowboys a tantalizing mix of arm talent and mobility.

one scout told Bob McGinn of the Milwaukee Journal Sentinel. "The guy's just a winner. He's got patience, focus, makes quick decisions, good arm strength, nice touch, stands tall in the pocket under pressure."

The 6-foot-2, 227-pound Prescott posted a 23-10 record in college and also ran for 2,501 yards and 41 touchdowns. He was arrested in March for DUI, but the Cowboys thought enough of his potential to take a chance.

Tapper (the No. 101 overall pick) is a 6-foot-3, 271-pound pass rusher out of Oklahoma who could see plenty of action early while Randy Gregory and Demarcus Lawrence serve suspensions to start the year.