Ku dhammee weedhan soo socda: Fernández wuxuu ku dhashay magaalada Santa Clara ee dalka Cuba. Saddex jeer ayuu isku dayay in uu u baxsado Maraykanka ka hor inta uusan ugu danbeyn ku guuleysan 2008. Wuxuu ka soo bartay dugsiga sare ee Braulio Alonso ee ku yaal Tampa, Florida, waxaana doortay Marlins wareegga koowaad ee mashruuca MLB ee 2011. Fernández wuxuu MLB ugu soo baxay Marlins bishii Abriil 7, 2013. Waxaa loogu magac daray
2013 National League All-Star Team, wuxuuna ku guuleystay abaalmarinta Rookie of the Month ee National League (NL) bilaha Luulyo iyo Agoosto. Xilli ciyaareedkii ka dib, wuxuu ku guuleystay abaalmarinta NL Rookie of the Year Award wuxuuna ku dhammaaday kaalinta saddexaad ee codbixinta abaalmarinta Cy Young. Wuxuu ku dhacay qalliinka Tommy John inta lagu gudajiray xilli ciyaareedkii 2014 waxaana loo magacaabay kulankiisii labaad ee All-Star ee 2016.