Currently it has around 400 subscribers. The site is this by the way. http://supermiddleweightboxing.blogspot.com/ Im wondering whether you think it could go big?
The site has potential but I think it needs some work, the header could be better and you should consider getting your own domain name, and you should be consistently building backlinks.
Considering the content the site have a potential to grow. but you need to redesign it for better appearance
Like I suggested to another member, I think you have a better opportunity to grow if you get your own domain and hosting, and stay away from free blogs but you gotta start somewhere.