Ka cika wannan magana: An haifi Fernández a Santa Clara, Cuba. Ya yi ƙoƙari sau uku ba tare da nasara ba don ya tsere zuwa Amurka kafin ya yi nasara a 2008. Ya shiga makarantar Braulio Alonso High School a Tampa, Florida, kuma Marlins ne suka zaɓe shi a zagaye na farko na shirin MLB na 2011. Fernández ya fara wasan MLB tare da Marlins a ranar 7 ga Afrilu, 2013. An kira shi zuwa ga
2013 National League All-Star Team, kuma ya lashe National League (NL) Rookie of the Month Award a watan Yuli da Agusta. Bayan kakar wasa, ya lashe lambar yabo ta NL Rookie of the Year kuma ya gama na uku a zaben Cy Young Award. Ya yi aikin Tommy John a lokacin kakar 2014 kuma an kira shi zuwa wasan All-Star na biyu a shekarar 2016.