I agree with the others. Boxing is not a sin. It would only be a sin for ordained ministers because THEY are not supposed to be strikers.
**Maybe it appeals to the fallen nature of man but so does a good pizza.

The goal of the sport is to knock the other guy out but don’t forget, the other guy has the same goal. It’s not an uneven match; both are well trained as far as skills and conditioning. If two people agree to step in the ring for the sport of it (amateur) or for the paycheck (professional), I don’t see the problem.
I suspect you will bring in those members of the sex trade and equate them with my argument but that is different. That has been spelled out in Scripture to be sin. I would then bring up insurance salesmen. They “deceive” you in order to make the most money they can; and we could go on and on…**