I remember reading Jeff Harding said he wasn't comfortable with his success after he won the andries fight.
Kelly was very tall for a middleweight, had a long reach and excellent power. Plus he had a solid chin. An atg? No way. He fought in straight lines, was preditable(therefore could be easily timed) and wasn't known for his hand or footspeed. He might have gone a little further had he laid off the sauce (Can anyone confirm he was a drunk?), but his limitations counterbalanced the massive advantages he had at 160.