Philadelphia 76ers' Andrew Bynum is shut down for three weeks Andrew Bynum's anticipated Philadelphia 76ers debut is on hold. One day before training camp was set to open, the 76ers announced Monday they would shut down their newly acquired center for three weeks as a precaution after he received knee treatment in Germany. "I'm going to do everything in my power to get back," Bynum said. Bynum had injections of plasma-rich platelets that supposedly stimulate healing in arthritis-affected areas in both of his knees. The 76ers said last week he was cleared to play in camp. Bynum felt some discomfort late last week and, after meeting with doctors in New York and Philadelphia, the 76ers made the call to bench him. The 76ers wanted to give him enough time to have the treatments take hold in the knee. The team said Bynum also had a bone bruise on his right knee. Bynum said the bone bruise was unrelated to the knee treatments. In other news, the 76ers also announced they have picked up the 2013-14 option on Coach Doug Collins' contract. The Chicago Bulls have given Coach Tom Thibodeau a four-year contract extension through the 2016-17 season. Washington Wizards point guard John Wall said he hopes to return sooner than expected from his knee injury. Wall could miss the first month of the regular season after being diagnosed with the early stages of a stress injury to his left kneecap. Cleveland Cavaliers Coach Byron Scott said Kyrie Irving's broken hand is completely healed, and the star guard will not be limited during training camp. Irving broke his hand in frustration during summer practice, slapping a padded wall in a practice. Milwaukee Bucks forward Luc Richard Mbah a Moute is expected to miss most of training camp while recovering from off-season knee surgery. The Transportation Security Administration said Joshua Richardson, New Orleans Hornets vice president of event presentation and broadcasting, has been arrested on suspicion of criminal possession of a weapon after a handgun was found in his checked baggage at New Jersey's Newark Liberty International Airport. It's unclear if the gun was loaded. Authorities say Richardson didn't have a permit to possess the weapon in New Jersey.