Should I put Roller Derby on my college application?

I spent a lot of time practicing on my junior roller derby team throughout high school, and am now on a regular team at the age of 18. Although some of my advisors are hesitant for me to put the sport on my college application, roller derby is a really big reflection of who I am and something I have spent a lot of time on. It is my sport. I'm putting it on my app regardless of what anyone says but I would love to hear your opinion!