Juan Chavarría Galicia, better known in the world of professional wrestling as Gran Marcus, was born on December 27, 1938, in Torreón, Coahuila, in the Laguna region, renowned for its significant contribution to Mexican wrestling. From a young age, he was trained by the legendary Halcón Suriano, debuting at the now-defunct Arena Charro Aguayo in Torreón against Manny Moñetones. Throughout his career, Markus became a prominent figure both in Mexico and the United States, achieving great success in the 1970s and 1980s.