Reggie Bush has long been assumed the top pick in the NFL draft, but after Vince Young's performance in the Rose Bowl, the Trojans wanted some assurance before the Heisman Trophy winner agreed to forgo his senior season. USC sources told ESPN's Chris Mortensen that coach Pete Carroll gave his blessing for Bush to turn pro only after being assured by Texans owner Bob McNair that the running back would be the No. 1 pick in the draft. Young, a Texas native, led his Longhorns to a victory over the favored Trojans in the national championship and ignited a public frenzy demanding Houston select the quarterback instead of Bush. However, the Texans appear to be sticking with their initial plan of drafting the running back -- a preference of the top candidate to become their head coach. A Broncos source told Mortensen that Gary Kubiak, Denver's offensive coordinator and the favorite for the Texans' head coaching post, believes current Houston quarterback David Carr can flourish with a new offense headlined by Bush and wide receiver Andre Johnson. Kubiak, a Houston native, is widely considered the likely successor to Dom Capers, who was fired as Texans coach on Jan. 2, one day after finishing a 2-14 season with a loss at San Francisco.