You'll notice something different about Tracy McGrady this season.  He's switching his jersey number from #1 to #3.  And he's got a pretty good reason for the switch.McGrady wore No. 3 in high school. He is making the switch to promote his humanitarian efforts in the Darfur region of the Sudan and a documentary on his summer 2007 visits to refugee camps in the region. The documentary, “3 Points,” is set for release this fall. The title refers to goals of peace,&...