In response to this article posted at Sherdog today, I thought I’d show All-Time MMA Rankings for the Lightweight division in detail and how it has trended in the past 3 years (using current version):
| 3 Years Ago | Today | Diff | |
| BJ Penn | 2790 | 2944 | 5.5% |
| Frankie Edgar | 2300 | 2845 | 23.7% |
| Takanori Gomi | 3249 | 2714 | -16.5% |
| Ben Henderson | 263 | 2709 | 930.0% |
| Gilbert Melendez | 1470 | 2141 | 45.6% |
| Shinya Aoki | 2061 | 2136 | 3.6% |
| Anthony Pettis | 48 | 1795 | 3639.6% |
| Joachim Hansen | 1509 | 1521 | 0.8% |
| Vitor Ribeiro | 1463 | 1460 | -0.2% |
| Eddie Alvarez | 860 | 1340 | 55.8% |
Everyone that stayed steady or increased slightly only saw fluctuations based on changes in ratings of key opposition or additional points earned between then and the end of their Lightweight runs.
Gomi got hit hard, because the system thought he was basically done three years ago. On today’s run, it re-considered and suggested he was still at or near his prime when it saw him under-perform once hitting the UFC; essentially proving that he wasn’t all he was cracked up to be at one time. Note: I try to disqualify post-prime failures, but it is not completely preventable.
In the past month, we’ve worked on some tweaks for the All-Time Rankings. As fighter careers last longer (time-wise) we’ve seen the need to put more weight on quality and less weight on quantity. Honestly, this is pretty subjective, but there’s no great way to do All-Time Rankings unless you look at sums or peaks and neither works great on its own. Nevertheless, the same version was used in both sets provided above.
EDIT: Re-posted and re-explained. Today values were incorrect.