This an interesting design. I like that it integrates all of the components I am looking for. I'm not sure how to describe how I feel about this logo, but I'll do my best. I think it's a little too soft edged, flawy, or rounded. The physiques of the competitors are chiseled. The sport is aggressive, attacking. This logo makes me feel more like relaxing than getting excited. I don't want to go too far down the path of aggressiveness, but this logo is probably too far in the other direction. I do like that you've used original images, and something that isn't extremely literal. You have some good elements in here.
Thank you for the quick changes! I like #18 better than #19. In #19 I lose the connection to wrestling with the image. I think I can see two wrestlers heads, and the arm of the one, but it's a stretch to assume they are wrestlers if the image stands on its own. #18's change from #16 and #17 is in the right direction. I'd like to see it got a little further in that direction though.