Why do black players seem to only desbribed in the same way

When reading the articles in lesson 7 and learning about the 2 images that African American players are categorized into. They have the "brutish" image where the athlete is categorized as being dumb but a physical specimen that is agressive and strong. Then theres the "sambo" image where the athlete is seen as comical, high energied and lazy. These images seem to be put on almost all African American athletes. When describing athletes like Ray Lewis or Adrian Peterson they show Lewis making a crushing tackle or Peterson running over a poor soul. When describing these men they talk about how these men are "beasts" or "unstoppable." This burns the brute image into our heads. When talking about the "sambo" image they show the dumb plays that we get to laugh at and talk about but this too burns the image into our heads. White athletes are described with a laid back and very technical style where black athletes are talked about with their agression and strength. It seems that almost all African American athletes are seen as the same thing. I can think of a few examples of this with Mike Vick and Kobe Bryant. These men arent described as the normal African American Athletes, they are praised for their expert technique and calmness when playing. Its upsetting that it seems to be that if an African American athlete is talked about that he is talked about for his power or aggressivness instead of his skills and technique.