Speaking after Hernandez returned to the Premier League with West Ham, Mourinho said: "I am not sure if it was his decision or the manager's decision (to leave Manchester United), but he's a good player, he's a player that will always score goals, so he is a player I would always welcome in my squad because he doesn't need many minutes on the pitch to score a goal."
"We moved in another direction and a younger player in (Romelu) Lukaku. We have (Marcus) Rashford that can be also a striker, he is originally a striker, so we didn't feel that need," explained Mourinho.
Though the Portuguese insisted that the 29-year-old was a good signing for the 'Hammers'.
"No doubt that for West Ham to get a player with his experience and his quality is very, very good," he concluded.
Hernandez will no doubt feel that he has unfinished business in the Premier League after being a bit-part player during his time at United.
There are no doubts about his ability in Germany though, where he scored 39 goals in 76 games for Bayer Leverkusen during a two-year spell.