I’ve been wondering how you determine weight divisions for historical bouts. There seems to be some irregularities from time to time.
For example:
Marvin Hagler vs. Morris Jordan is listed as a super middleweight contest and the fighters weighed in at 162 and 161 respectively.
For Marvin Hagler vs. Muhammad Smith both fighters weighed in heavier at 163, but the bout is listed as a middleweight contest.