Mexican rapper Juan Carlos Sauceda, better known as Lefty SM. Lefty SM started in music in 1992 in the world of rap and hip-hop in his native San Luis Río Colorado, Sonora. His career took off in 2017 when he launched his YouTube channel and began to gain a reputation in the Mexican urban scene. He collaborated with stars like Santa Fe Klan, with whom he recorded the tracks “Si me caigo”, “Con los ojos rojos” and “Por mi México,” one of his greatest hits.