In an effort to unload disgruntled center Omer Asik, the Houston Rockets have engaged in trade talks with multiple teams and are demanding an impact player in return, league sources told Yahoo Sports.

Rival executives say that Rockets general manager Daryl Morey has been active in discussing possible deals for Asik, but his asking price has been too high so far. Morey has been willing to accommodate Asik's summertime trade request, but has found little traction on possible deals.

Unless a team is willing to give the Rockets a frontline player who can help them win in the short-term, Morey is open to acquiring a largely unprotected first-round pick in the loaded 2014 NBA draft, sources said.

Beyond the unrest with Asik, the Rockets will be without third-string center Greg Smith, who is expected to miss 10 days because of a sprained knee, league sources told Yahoo Sports. Smith injured his right knee in the Rockets' victory over New York on Thursday. An MRI on Friday was negative.

Houston and Washington did discuss a deal involving Asik, league sources said, but the Wizards ultimately acquired Phoenix's Marcin Gortat to fill its hole at center. The Rockets had no interest in taking back center Emeka Okafor, who could be lost for the season because of a neck injury.

Morey and Asik's agent, Andy Miller, have been in regular contact about facilitating a trade. Asik, 27, requested the trade shortly after the Rockets reached agreement with free-agent center Dwight Howard in July.