I le aso 25 o Iulai, 2018, na taalo ai Hernández i se taʻaloga mo le taimi muamua i lana galuega, ma ulufale atu i le 16th inning faasaga i le Philadelphia Phillies ma pikiina le leiloa ina ua savali lua tagata taʻavale ma tuʻuina atu se tolu-taʻavale savali-taʻavale. O ia o le tagata taalo muamua talu mai Babe Ruth e taalo i le infield, outfield ma tuu atu 3 tamoe pe sili atu i le taaloga lava lea e tasi. O ia foʻi o le tagata taʻalo muamua na faia se home run i le taʻaloga. Mo le vaitau, na ia taina.256/.336/.470, taina se galuega maualuga 21 home runs ma 52 RBIs. I le postseason, na ia lua mo le 12 i le NLDS faasaga i le Atlanta Braves, tasi mo le 14 i le NLCS faasaga i le Milwaukee Brewers ma lua mo le 15 i le 2018 World Series
e faasaga i le Boston Red Sox, ma le tasi le home run.