His passing was announced by his son, El Hijo de Rey Misterio, in a Spanish-language Facebook post, with the circumstances surrounding his death under wraps.

The passing of Rey Misterio Sr. has sent shockwaves throughout the wrestling world, sparking an outpouring of condolences from fans and colleagues to his grieving family.

Throughout his career, Rey Misterio Sr. competed in various prominent promotions, including Lucha Libre AAA Worldwide, which was previously known as Asistencia Asesoría y Administración (AAA).

He also trained some of the most notable luchadors in the industry, including his own nephew, Rey Mysterio (Óscar Gutiérrez Rubio), who followed in his footsteps to achieve global success in WWE.

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