| Villano I | |
|---|---|
 | |
| Birth name | José de Jesús Díaz Mendoza |
| Born | June 28, 1950 Mexico City, Mexico |
| Died | January 4, 2001 (aged 50) Mexico City, Mexico |
| Spouse(s) | Delia Valero |
| Children | 2 |
| Parent(s) | Ray Mendoza (father) |
| Relatives | Villano II (brother) Villano III (brother) Villano V (brother) Villano IV (brother) Villano III Jr. (nephew) El Hijo del Villano III (nephew) Villano V Jr. (nephew) Rokambole Jr. (nephew) |
| Professional wrestling career | |
| Ring name(s) | Bestia Negra I Búfalo Salvaje I Toro Bill El Villano Villano I |
| Billed height | 1.75 m (5 ft 9 in) |
| Billed weight | 88 kg (194 lb) |
| Trained by | Ray Mendoza Bobby Bonales Perdo Nieves |
| Debut | 1969 |
| Retired | 1997 |
José de Jesús Díaz Mendoza (June 28, 1950 – January 4, 2001), best known by his ring name Villano I (Spanish: "Villano Primero"; English: "Villain the first"), was a Mexican luchador enmascarado (or masked professional wrestler). He was the son of luchador Ray Mendoza, and the first of the five Díaz brothers to become a luchador, although not the oldest. His elder brother Alfredo wrestled as Villano II until his death in 1989, while his younger brothers wrestled under the names Villano III (Arturo), Villano V (Raymundo) and Villano IV (Tomás).