Headcanon: Mega Man is a fan of the Chicago Bulls.
I’m not joking, one of the special pieces of art found in R20+5 is a manga called “The Birth of Mega Man” written and drawn by Inafune himself. Rock is shown wearing a shirt with the word “BULLS” on the back, a 23 on front, and an S on the sleaves.
Now who else wore a 23 in the world of sports utilizing the word Bulls and a red-white combo?
How about our old pal Michael Jordan? The proof is in the pudding.