USA Basketball chairman Jerry Colangelo says the earlier start date for the 2012 Olympics could require the Americans to submit a 12-man roster before the 2011-2012 NBA season is over.

The rosters will be due on June 18, 2012, forcing Colangelo and coach Mike Krzyzewski to pick their squad without the benefit of having the players together for a training camp.

"Literally what I have to do now is just look at what happens the rest of this season and what happens next season during the year and then we have to submit our roster," Colangelo said.

The London Games open July 27, 2012.