I appreciate this is veering somewhat off-topic, but just wanted to point out that sports law is a perfectly valid branch of commercial law and many large law firms will have a specialist sports law practice. For example:
Sport ~ Hammonds
Sports Law
Bird&BirdSport
There are also smaller firms that specialise solely in sports law.
So please don't write it off as a "puff" "non-subject" just because of your own ignorance.