However, Staubach, who won two Super Bowls and was selected for six Pro Bowls in a Hall of Fame career, believes that Manziel will prove to be a major success in the NFL and could emulate Russell Wilson of the Seattle Seahawks.
"I think Manziel is a Russell Wilson-type player. He doesn't have the height, [but] he has a strong arm and he throws with accuracy," Staubach told NFL Network.
"I just think there's something about this kid - the quickness. Today in the league, the quarterbacks can fly; we weren't allowed to do that. I think Manziel is going to be a valuable player in the NFL."
This year's Draft will take place in New York City from May 8 to May 10.