Juan Carlos Díaz Quincoces

Juan Carlos Díaz Quincoces (26 January 1933 – 28 November 2002), known as just Quincoces, was a Spanish footballer who played as a defender. He made eight appearances for the Spain national team from 1957 to 1959.

His uncle, Jacinto Quincoces, was also a professional footballer, a Spanish international, and a prominent coach. Juan Carlos was often referred to by his maternal surname - 'Quincoces II' - to distinguish him from his famous uncle, although the conventional practice would have been to use his paternal surname, Díaz. They worked together at Valencia as coach and player in two spells.