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Andrés Ponce Ruiz Jr., better known as Andy Ruiz Jr., is a Mexican-American professional boxer who holds the WBA, IBF, WBO, and IBO heavyweight titles. He is the first Mexican boxer to win a heavyweight world championship. Ruiz Jr. was born in Mexicali, Baja California, Mexico, and moved to the United States as a child. He began boxing at the age of 15 and turned professional in 2009.