Portland's Brandon Roy and LaMarcus Aldridge, plus Houston's Trevor Ariza and Boston's Glen Davis will not be in Las Vegas. New York forward David Lee and Indiana's Danny Granger will attend minicamp but won't participate.
The roster stands at 23 after Monday's announcements. The minicamp is being used to identify possible candidates for available spots on the U.S. teams in the 2010 world championships and 2012 Olympics.
The Americans will hold training sessions Thursday and Friday, then play an intrasquad exhibition game Saturday night.
The other participants are: Oklahoma City's Kevin Durant, Jeff Green and Russell Westbrook; Memphis' O.J. Mayo and Rudy Gay; Chicago's Derrick Rose; the Clippers' Blake Griffin; New Jersey's Devin Harris and Brook Lopez; Portland's Greg Oden and Jerryd Bayless; Utah's Paul Millsap, Ronnie Brewer and Kyle Korver; Philadelphia's Andre Iguodala and Thaddeus Young; Charlotte's D.J. Augustin; Minnesota's Kevin Love and Atlanta's Josh Smith.