The Dallas Mavericks announced the signing Friday of second-round draft choice Jae Crowder, the 34th overall pick. The 6-foot-6, 235-pount Big East player of the year at Marquette was acquired last month from Cleveland, along with draft rights to 24th pick Jared Cunningham and 33rd pick Bernard James.Crowder is playing for the Mavericks' summer league team and averaging 14.7 points and 5.7 rebounds through three games.The NBA Board of Governors approved a new look for uniforms and a couple of changes in the use of video replay.On Friday night in the Las Vegas Summer League, Crowder scored 18 points and had four rebounds as the Mavericks defeated the New Orleans Hornets team 78-65. Dallas' young players are 3-1 in the summer league.Dominique Jones scored 16 points for Dallas, and Mavericks draft pick Bernard James had nine points and eight rebounds. Justin Dentman had 12 points for the Mavs.Rockets-Celtics tradeThe Houston Rockets will send Courtney Lee to the Boston Celtics as part of a multi-team, sign-and-trade deal completed on Friday. The Rockets will receive a second-round pick in next year's draft from Boston, forward JaJuan Johnson, guard E'Twaun Moore and forward/center Sean Williams. Houston will also acquire the rights to guard Jon Diebler from Portland. The Celtics completed the deal by trading guard/forward Sasha Pavlovic to Portland.Briefly Bulls: Derrick Rose, in a video posted Friday on his Facebook page, said he is "going to be all right" and "should be back there on the court soon." Knicks: Newly-acquired guard Jason Kidd apologized on Twitter for his arrest on a drunken-driving charge after an accident last week. Lakers: Forward Jordan Hill, traded in midseason to the Rockets, is returning to Los Angeles for a two-year, $8 million deal. Rockets: Bulls restricted free agent center Omer Asik signed a three-year, $25.1 million offer sheet that Chicago, upon receiving it, will have 48 hours to match it or let Asik leave. Suns: Guard Shannon Brown has re-signed with Phoenix, a two-year, $7 million deal.