The Cleveland Cavaliers are actively shopping second-year shooting guard Dion Waiters, according to sources with knowledge of the situation. Three teams the Cavaliers are known to have spoken with are the New York Knicks, Chicago Bulls and Philadelphia 76ers, the sources said. It is believed they have reached out to other clubs as well. Waiters, whom the Cavaliers drafted with the No. 4 pick in 2012, has a contentious relationship with several of his teammates, including star point guard Kyrie Irving, and sources say he is open to being traded. In fact, while Waiters has not demanded a trade, he brought up the subject in a three-hour meeting last week with coach Mike Brown and general manager Chris Grant, according to sources. The Cavaliers are looking to shake things up after their surprisingly disappointing 4-10 start. Part of their problem has been the dysfunction in their locker room. The 6-foot-4 guard got into an altercation with teammate Tristan Thompson during a players-only meeting after a 29-point loss to Minnesota on Nov. 13, sources said. Sources described the following account: Irving called the meeting after the game and every player spoke. When Waiters was given the floor, he criticized Thompson and Irving, accusing them of playing "buddy ball'' and often refusing to pass to him. Thompson took umbrage with Waiters' words and went back at him verbally. The two confronted each other but teammates intervened before it could escalate into a fight