If you have a big win - like $500k or several wins that add up to that much - or if you are known in the poker community - then you should mention it - so that they hear it from you and not from office rumors.
I have a friend with a big tournament win and he lists it in his resume. If the interviewer wants to talk about it then fine.
If every answer in a job interview involves poker then you will seem 1-dimensional.
So in general - I would not talk about poker in a job interview.
As an ex-recruiter (I'm no longer one now just to clarify, got out of that game a few years ago thank god), if I was asked this from a candidate, my response would be to avoid the conversation entirely and to definitely not put it on your CV/resume.
Some people have a very dim view of gambling in anyway shape or form, and there is no way to know how a potential employer may view poker. In most cases you would probably be fine, however do you want to risk losing out on the opportunity because the hiring manager is anti-gambling and doesn't like the idea of their potential employees playing poker?
Once you are in the job, if they find out via office rumours etc. then by that point it is too late and there is not anything they can do as you have already been employed. They cannot fire you for your hobbies outside of work (in most cases, there are some exceptions).
Ultimately I would keep your poker playing to yourself until you have got the job and have had a chance to feel out the companies/managers views on poker in general. If they invite you to an office
poker game for example, then I'd take that as a green flag and discussing it would likely not be a problem (other than them worrying you'll be too good and un-inviting you of course)
, at least in Romania, when everyone hears about poker or other games, they immediately look at you as a gambler and you are excluded
