Mixed martial arts has undergone incredible changes in the 25 years since its arrival on a cold night in Denver. Granted, the concept of mixed discipline combat had existed long before the UFC made its debut in 1993, but what the upstart promotion offered to the public that night in 1993 became the mold that shaped what the sport would become in the years that followed.

Bellator MMA is making a massive splash in 2018 with its Heavyweight Grand Prix, designed to crown the next Bellator MMA heavyweight king.