Salvador Guerrero IV better known by his ring names Chavo Guerrero and Chavo Guerrero Jr., is an American professional wrestler. He is best known for his tenures in World Championship Wrestling (WCW), World Wrestling Federation/Entertainment (WWF/WWE), Total Nonstop Action Wrestling (TNA), All Elite Wrestling (AEW), Lucha Underground (LU), Ring of Honor (ROH) and Nación Lucha Libre (NLL).

Lucha Underground was an American professional wrestling promotion founded in 2014 by United Artists Media Group. Partly owned by Lucha Libre AAA Worldwide (AAA), Lucha Underground also refers to its weekly television program, which featured characters portrayed by wrestlers from AAA and the American and Mexican independent circuits. The series originally aired in English on El Rey Network and in Spanish on UniMás.