Difficult to get list of such blogs instead you can search in google using your KEYWORD IN inverted commas
Another way would be to manually find blogs who are in your same niche and then PM the webmaster for guest blogging.
You can use automated services for that, they do all the hard work and save you alot of time. if you want i can give you a few services i tried
You want it to post comments or you want to put your own articles in other blogs? if you want to publish your articles in other sport related blogs i can help you with a good list
Hi sir if you want HQ Sites those DA PA You want so please contact me i will provide you all niches sites with HQ and good traffic contact me:
workinsports.com/ sportsnetworker.com sportshaze.com This are some blog sites which accepts sports guest blogs.