Juan Manuel González Barrón is a Mexican luchador who is best known under the ring name Dr. Wagner Jr., having used that name since 1987. He is the son of Manuel González Rivera, better known as Dr. Wagner and the brother of the late César Cuauhtémoc González Barrón, who worked primarily under the name Silver King. His son made his lucha libre debut 2009 under the ring name El Hijo de Dr. Wagner Jr. González was once married to professional wrestler María Moreno León, better known as Rossy Moreno.

Manuel González Rivera was a Mexican professional wrestler, or Luchador best known under the ring name Dr. Wagner. González made his professional wrestling debut in 1961 and worked the majority of his career for the Mexican professional wrestling promotion Empresa Mexicana de Lucha Libre (EMLL). As Dr. Wagner, he worked most of his career as an enmascarado, or masked wrestler, losing his mask to El Solitario in 1985. Along with Ángel Blanco, González formed one of the premier tag teams of the 1960s and 1970s called La Ola Blanca. One of his sons works as a professional wrestler under the name Dr. Wagner Jr., and another son wrestled as Silver King until his death in 2019. One of his grandsons made his wrestling debut in 2009 under the name El Hijo de Dr. Wagner Jr. or Dr. Wagner III.