Dan Langhi's agent, Bill Duffy, has asked the Rockets to trade the second-year forward, reports Jonathan Feigen of the Houston Chronicle.  The Rockets are high on Langhi's potential, but he is buried on the IR (sprained ankle) behind Rice, Williams, and possibly rookie Terence Morris.  Langhi feels he needs to get on the court for the sake of his career.  His contract expires at the end of the year.  The request does not seem to be antagonistic and Duffy recognizes that a deal may be too hard to put together.