REEBOK and RBK are both trademarks of Reebok. They co-existed a few years ago. Replace REEBOK with RBK.

In addition, LZ knows that Reebok has been acquired by adidas. If it is on the uniform If it’s REEBOK, then it should just be a LOGO used for the sake of beauty when designing clothes. I don’t think it has any other meaning.