A PhD is required for this job. You must first have at least a 3.5 grade point average and SAT scores in the 90th percentile.
Yeah, you just have to win fights. If you do that, and manage to secure yourself a manager or promoter who continues to find you tougher and more prestigious opponents, you can go far. However, the college degree might be good for when you're a vegetable and have to find some way to make money while working from home and barely moving.