In the near future, we will be releasing a new feature: Generated Historical Ranking Sets
This will allow you to view issues of divisional rankings which predate FightMatrix, that have been generated by a recent version of the software rating system. Ever curious what the Top 25 Heavyweight list looked like in 1999, or who the #1 Middleweight was in 2002? This feature will solve those problems.
However, let it be known that data in the early days (as well as the amount of fights) was extremely sparse. Expect some anomalies as a result.
Later down the road, we plan on creating fighter profiles that will leverage this data and display a timeline or historical ranking on a fighter-per-fighter basis.