last i heard brock doesn't full sight in one of his eyes, thats what the article said .as for brewster it really looked to me like he just didn't want it anymore after his fight vs wlad , even in his interview after the fight he just sounded like he didn't have the drive , focus, ect
i think both have eye problems, career ending ones, didnt stop corey sanders and iran barkley but im sure bock and brewster have more brains