Harper Terry Williams is an American former basketball player who played professionally for 17 years, including ten in Spain's Liga ACB. He played college basketball for the UMass Minutemen.

The Liga ACB, known as Liga Endesa for sponsorship reasons, is the top professional basketball division of the Spanish basketball league system. Administered by the Asociación de Clubs de Baloncesto (ACB), Liga ACB is contested by 18 teams, with the two lowest-placed teams relegated to the LEB Oro and replaced by the top team in that division plus the winner of the promotion playoffs.