Juan Manuel Martínez Martínez (born 26 September 1955), commonly known as Casuco, is a Spanish former football right back and manager.
Born in Lorca, Region of Murcia, Casuco spent most of his career at Real Zaragoza, playing more than 320 competitive matches.
[1] In 1986, he won the Copa del Rey with his main club.
[2] Casuco also represented Elche CF in La Liga,[3] being relegated at the end of the 1977–78 season after starting in all his 27 appearances.
Casuco started working as a manager in 1994.