Alberto \"Baby\" Arizmendi was a professional boxer and featherweight world title holder. He also competed in the bantamweight and welterweight divisions. Arizmendi is famous for being the youngest boxer to turn pro.

On September 16, 1932, at the age of 19, he defeated reigning NBA World featherweight champion Tommy Paul in a ten round non-title fight, dropping him once in the process. The NBA world title was not at stake because Paul came in over the weight limit. After that win, Arizmendi requested that the NBA recognize his status as champion.