The Dallas Cowboys are waiting another year in drafting Tony Romo's possible successor.

The Cowboys had private workouts with Bryce Petty, Brett Hundley, Garrett Grayson and Sean Mannion but did not pull the trigger on any of them. They will add UTEP quarterback Jameill Showers as an undrafted free agent and will have South Alabama's Brandon Bridge in for a tryout at this weekend's rookie minicamp.

Of the four quarterbacks they worked out, Petty drew the most interest from the Cowboys.

"All positions are always in the mix," Cowboys coach Jason Garrett said after the draft. "We evaluate guys, we put them up on the board and if it made sense for us at a particular time to take one of these quarterbacks who we liked, we'd be all in to take one. Same thing with the running back position. Same thing with the receiver position. For whatever reason, we liked guys on the board better and went ahead and pulled the trigger on them."

The Cowboys last drafted a quarterback in 2009 when they selected Stephen McGee in the fourth round.

Dallas has drafted just three quarterbacks since taking Troy Aikman first overall in 1989 (Billy Musgrave in the 4th in '91, Quincy Carter in the 2nd in 2001 and Steve Walsh in the '89 supplemental).