What are some majors I can take to become a professional basketball player?

Most professional athletes’ careers last only several years because of injuries and age.
Pay attention in biology and health science. You’ll learn how your body works and how to keep it in peak condition.
Gain extensive knowledge of your sport, build skills, and learn about teamwork by playing as much as you can in high school (and before).

Spend hours practicing and training, often every day
Understand the strategies and rules of your game
Follow a strict diet while training
Review videotapes of your own performance to work on your weaknesses
Work odd hours, including weekends and holidays
Travel often

Traditionally, college major has no bearing in success as a professional athlete. Instead it hinges on physical ability and potential, so hours spent at practice are a better indicator of potential success. However, that isn't to say college choice doesn't matter, several sports (including basketball) have intellectual components which can increase your understanding of the game, and increasing your skill level. So even though precise major doesn't matter, it is important to pursue some level of higher education to become a more rounded basketball player, as well as person.