Whats with this?
"Is TUF a league?"
Get a dictionary
nevermind... You might get lost, here.
1. a covenant or compact made between persons, parties, states, etc., for the promotion or maintenance of common interests or for mutual assistance or service.
2. the aggregation of persons, parties, states, etc., associated in such a covenant or compact; confederacy.
3. an association of individuals having a common goal.
4. a group of athletic teams organized to promote mutual interests and to compete chiefly among themselves: a bowling league.