Oklahoma sophomore guard Willie Warren, as expected, is leaving early for the NBA.

According to sources, the 6-foot-3 Warren will sign with an agent and forgo his final two seasons in Norman.

Warren was expected to have a huge season after the loss of National Player of Year Blake Griffin, but he was unable to shoulder leadership duties and the Sooners struggled to a 13-18 record this past season.

Warren averaged 16.3 points per game, but he clashed with Sooners coach Jeff Capel and also missed 10 games due to injury and sickness.

Warren was believed to be a lottery pick entering the season, but several NBA executives have told FOXSports.com that it's unlikely he will be taken in the lottery.