I saw him fight a number of times. Out of san Diego, I think. Looked real good early in his career. If my memory is correct many people thought he beat Hearns- that fight was noteworthy because it was the only time Hearns ever hung on to avoid being stopped. Kinchen didn't finish well, either.
What held him back, I think, was a tendency to get lazy in fights and stop throwing punches. That is my memory but I haven't seen him fight or thought about him in years. looking at his record it kind of suprises me that he beat Mrvin mack- I wouldn't have thought he'd beat a tough, busy guy like that, moving up in weight.