| Casuco | |
| Fullname: | Juan Manuel Martínez Martínez |
| Birth Date: | 26 September 1955 |
| Position: | Right back |
| Youthyears1: | 1970–1972 |
| Youthclubs1: | Águilas CF |
| Youthyears2: | 1972–1974 |
| Youthclubs2: | Real Madrid |
| Years1: | 1974–1976 |
| Years2: | 1976–1977 |
| Caps2: | 13 |
| Goals2: | 1 |
| Years3: | 1977–1979 |
| Caps3: | 64 |
| Goals3: | 1 |
| Years4: | 1979–1988 |
| Caps4: | 297 |
| Goals4: | 2 |
| Years5: | 1988–1989 |
| Caps5: | 19 |
| Goals5: | 0 |
| Years6: | 1989–1990 |
| Caps6: | 12 |
| Goals6: | 0 |
| Years7: | 1990–1991 |
| Totalcaps: | 405 |
| Totalgoals: | 3 |
| Manageryears1: | 1991–1993 |
| Managerclubs1: | Águilas CF |
| Manageryears2: | 1994–1995 |
| Managerclubs2: | Lorca CF |
| Manageryears3: | 1995–1996 |
| Managerclubs3: | Las Palas |
| Manageryears4: | 1996 |
| Managerclubs4: | Toledo |
| Manageryears5: | 1997–1998 |
| Managerclubs5: | Plasencia |
| Manageryears6: | 1998 |
| Managerclubs6: | Águilas CF |
| Manageryears7: | 1999–2000 |
| Managerclubs7: | Segoviana |
| Manageryears8: | 2000–2004 |
| Managerclubs8: | Almería |
| Manageryears9: | 2005–2006 |
| Managerclubs9: | Murcia |
| Manageryears10: | 2006–2007 |
| Managerclubs10: | Tenerife |
| Manageryears11: | 2007–2008 |
| Managerclubs11: | Xerez |
| Manageryears12: | 2010–2011 |
| Managerclubs12: | Castellón |
| Manageryears13: | 2013–2015 |
| Managerclubs13: | Águilas FC |
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. At the professional level, he worked in Segunda División with CD Toledo, UD Almería,[4] Real Murcia,[5] CD Tenerife[6] and Xerez CD.[7]
Zaragoza