This is the audio recording of the second Muhammad Ali vs. Floyd Patterson boxing match contested on September 20, 1972, for the NABF championship. It followed Patterson's victory over Oscar Bonavena in February 1972. The fight lasted 7 rounds. After the ringside doctor inspected eye between rounds, referee Arthur Mercante Sr. stopped Patterson from coming out for the eighth round, giving Ali a RTD (retired) victory. This was the final fight of Patterson's career.