Rod Thorn, the league's president of basketball operations, said George made his comments in the postgame news conference following the 102-90 loss to the Heat on Monday night.
Miami was 30 of 34 from the foul line in the game. Indiana was 11 of 17.
George said his team couldn't overcome a "20-point differential" that came through foul calls. He said Miami won the game at the free throw line.