Antonio Sánchez Rendón (both September 4, 1954 in Ocotlán de Morelos, Oaxaca, Mexico), is a retired Mexican luchador, or professional wrestler best known under the ring name El Signo (Spanish for "The Sign"). Rendón was part of Los Misioneros de la Muerte ("The Missionaries of Death") with Negro Navarro and El Texano a team that is credited with popularizing the Trios match in Mexico to the point that it became the most common match for in Mexican Lucha Libre.