You got Reeboks? What I would have done for Reeboks! I had Pumas. Yes, Puma!
And no, athletes (to my understanding) are not required to wear the shoes of the school sponsor, they can go buy their own shoes. Only thing is if they wear a competitors brand (Nike, UA, Reebok, Anta, etc.) they have to cover up all logos and identifiable marks. That's why Shevon covered the swoosh and LeBron logos on his shoes (I have the same pair, so I know) and to 99% of the EBA crowd they just looked like green shoes. I'm surprised more amateur players don't resent being a billboard for shoe companies.