Billy Gillispie, American basketball player and coach
Billy Clyde Gillispie ( ghih-LIS-pee; born November 7, 1959), also known by his initials BCG and Billy Clyde, is an American college basketball and current men's basketball coach at Tarleton State. Gillispie had previously been head coach at UTEP, Texas A&M, Kentucky, and Texas Tech.

After leading both UTEP and Texas A&M to postseason appearances one year after poor seasons, Gillispie became the only college basketball coach to be in charge of the National Collegiate Athletic Association (NCAA) program with the biggest turnaround in two consecutive seasons. Gillispie was known as an excellent recruiter who managed to put together four straight top-25 recruiting classes. In his three seasons at Texas A&M, the Aggies achieved three consecutive 20-win seasons for the first time in the program's history.