A live microphone caught LaMelo saying, "Beat that n---a ass," during what was intended to be a light-hearted segment featuring his father and WWE's The Miz. LaMelo was laughing as he said it.
A representative for the Ball family could not be reached for comment late Monday night.
"The inappropriate language used by a guest during the 'Miz TV' segment was not scripted nor reflects WWE's values," WWE said in a statement.
LaMelo Ball will be a junior at Chino Hills High School near Los Angeles in the fall. The point guard is committed to UCLA as a member of the Class of 2019.