Technically it isn't really trademark infringement until you make $0.01 on an active website or related business! If you had zero revenue, zero ads, zero anything financial, then in theory you would likely be safe. Although don't forget that "in theory" does not apply to all UDRP panellists unfortunately.
Another factor is what
@Kate said .. in that it could be an issue in the very fact you aren't using it and that you are a domainer looking to profit all the other domains in your portfolio.
Much more importantly .. The fact you purchased the name specifically because of one individual is a big negative against you (as opposed to just getting a random name with no intended specific person in mind)
After looking into trademarks and being a domainer a couple of years now, I *personally* am against getting full names of individuals .. with the exception of dead people and some politicians.
At the end of the day 99% of full names purchased are targeting individuals of interest, which is absolutely wrong both legally and ethically as a domainer in my personal point of view. People who say domainers who buy full names of celebrities are cyber-squatting, are indeed correct in that assessment .. again .. in my point of view.
That being said .. while full names I think are almost always too specific to be argued that they are "generic", first or last names ALONE I think are totally fine and indeed generic enough to hold for profit as a domainer.
At the end of the day you need to genuinely ask yourself .. did you buy the domain specifically targeting a specific individual or company? If the answer is yes, then what you are doing is wrong (unless of course your only intention ever was to make a never-for-profit fan site .. and not even hope to resell it to the person for anything more than regfee).
If there truly is another random reason for purchasing the domain, then in theory that's fine. Like if you're writing a book or movie and the title is the name of a character. But realistically if the name is one of a well known person, you will never win in court as you'll have a very hard time getting a judge or UDRP panellist to believe you.
Anyhow .. best of luck to you with it! lol ... If I were in your shoes I'd maybe reach out to the management and offer it to them for some tickets to their next fight, something signed .. or something else cool that wouldn't really cost them anything of significance.