Yeah, he’s not a very good defender in CF. This was the big knock on him throughout the minors coming up. Despite his elite speed, he gets no added range in the OF because he gets late reads on balls. I don’t care how great you look running full speed for a catch, if took your first step a second too late that should have been a routine play.
To me this makes Duran a better fit for LF, which puts more pressure on his bat.