Sergio Raymundo Chávez Velasco, better known by his ring name Niebla Roja (Spanish for "Red Mist"), is a Mexican luchador (or professional wrestler), who currently works for the Mexican wrestling promotion Consejo Mundial de Lucha Libre (CMLL). He previously worked as Ángel de Plata (Spanish for "Silver Angel") between 2008 and 2012 before adopting his current ring name. A second-generation wrestler, he is the son of retired wrestler Apolo Chávez, and the brother of Miguel Ángel Chávez Velasco, who is also a luchador under the ring name Ángel de Oro (Spanish for "Golden Angel").