He's officially being listed as day-to-day, but the injury is not considered serious. Team USA was playing on a back-to-back and Tatum was being rested as a precaution, sources said.
Tatum is averaging 11.5 points and five rebounds in the pre-Olympic exhibition games thus far.
The United States has lost two straight exhibition games heading into the Olympics. They lost to Australia 91-83 in Las Vegas Monday after falling to Nigeria in the previous game. Team USA has lost four of its past five games.