Looks that this was also not only small boxers era, this was era where some boxers were larger than their opponents in marquee fights. Patterson definitely had good amateur resume and pro resume. Approx 190 lber. His most notable lost fights were vs Liston ( 220 lber ) and Ali who too was larger than he. 4 defeats in his resume vs these opponents. I think if Patterson was 220 lbs boxer's size, he had been more competitive vs 220 lbs Liston and most likely had defeated Liston.