Pedro Aguayo Ramírez was a Mexican professional wrestler and promoter who achieved fame in wrestling as Perro Aguayo Jr. or El Hijo del Perro Aguayo ("The Son of Perro Aguayo").

He was the real-life son of lucha libre legend Perro Aguayo and not a storyline "Junior". Aguayo was best known as the leader of the Los Perros del Mal stable, which he started in Consejo Mundial de Lucha Libre (CMLL) in mid-2004. The stable became a significant draw in Mexican professional wrestling, peaking during Aguayo's storyline rivalries with Místico and Héctor Garza.