He was just too tired during the games to dunk as well as he normally does - from 4 years ago <iframe width="640" height="480" src="http://www.youtube.com/embed/CmIuHdeL_vk?rel=0" frameborder="0" allowfullscreen></iframe>
Too many games too fast in the NBA. Top end explosiveness is the first thing to go. Couple that with the compressed season and his lack of NBA conditioning and there you go. At the start of the season, his vertical was higher than ever from training with Sparta Science. His dunk against the Wizards was clean, but a few games later against the Mavs he barely made it. I would like to see him get back to doing one footed two hand dunks like in college. That dunk in traffic at UConn was pretty.
^^^^^ This... And these guys are his old high school buddies and a couch he is playing with.. I think.