Gus proved this when he went to war with a prime Jones for 5 hard rounds. He showed that he is arguably the better fighter than Jones and a lot of MMA experts thought he won that fight and could quite possibly beat Jones if they did ever rematch. Gus is the dark horse of the light heavyweight division. The guys who he has lost to have been top level guys and Gus could have easily won those fights. I don’t think that Gus gets enough credit around here. Just because he hasn’t been champion dosen’t mean he isn’t one of the greatest lhws ever.