poker texas hold'em

[Gibbs]

And no, poker isn't all about luck. Knowing how to play is really important, you'll never win if you don't know how and when to raise and when to fold

Yeah, it's not all about luck. There are indeed strategies etc., but this is, as far as I know, one of the only sports where a total amateur can beat a professional player. Luck plays a major role.
There are some more similar sports I believe, but mostly, when e.g. I've been running marathon my whole life, a person with no athletic history can have nothing on me.