Sergio Raymundo Chávez Velasco (born March 20, 1986) is a second-generation Mexican luchador or professional wrestler, better known by the ring name Niebla Roja (Spanish for "Red Fog") and previously worked as Ángel de Plata (Spanish for "Silver Angel") between 2008 and 2012 before adopting his current ring name.
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 (Golden Angel").
Chávez has been working for the Mexican wrestling promotion Consejo Mundial de Lucha Libre (CMLL) since 2008.
He is the current CMLL World Light Heavyweight Champion and a former CMLL World Trios Champion as part of Los Guerreros del Infierno with Euforia and Último Guerrero.
Chávez wrestled in the main event of the CMLL 84th Anniversary Show, losing the match and his mask to Gran Guerrero.