 In 2015, he became a naturalized American citizen.Fernando Valenzuela, the youngest of twelve children, was born in Etchohuaquila, a small town within the municipality of Navojoa in the state of Sonora, Mexico.His birth date is officially listed as November 1, 1960, but during his rookie season in 1981, several commentators questioned his age, guessing him to be significantly older than twenty.