I'm laughing at a few of these "Aw hell no, there ain't gone be no pony sh*t in my League" posts where the person seem to know an awful lot about the show.
You know, almost like... they watch it secretly.
Anyway, a normal nature Centaur skin would be nice. None of that fantasy bullcr*p Warcraft style either, just a plain ol' horse body with a muscle bound tribal tattoo covered human body on top wielding ...I dunno, a spear adorned with feathers and other trinkets? Throw a bow and quiver over his shoulder for the looks as well, even if he never uses it.