TrueSkill Ratings

TrueSkill is a rating system designed by Microsoft for use in online games.

This implementation of TrueSkill uses the following variables;

  • Initial Mean: 750
  • Initial Standard Deviation: 250
  • β: 125
  • Dynamic Factor: 2.5

TrueSkill works by tracking the mean rating of players alongside the uncretainty in player skill. Using these two variables, a conservative estimate of skill rating can be produced.

The more certain the rating system is of a skill rating, the less it will change over time, the more certain, the faster it will change. The certainty increases with consistent results from a given fighter.

These ratings exclude fighters who have not fought within the last 18 months.

To read more about the TrueSkill rating system, either visit the Microsoft research page or the whitepaper.


Please be aware that these ratings are calculated pound-for-pound, not per weight class. Fighters who recently switched weight class have ratings based primarily on having competed in their previous class and are not adjusted to their new class.


Weight Class
Gender
Promotion
Page Size
Page

# Name Rating Record Promotion Gender Last Fight Weight Class
1 Jon Jones Bones 1335.4 25-1 (1) Ultimate Fighting Championship Male 06 Jul 2019 205
2 Daniel Cormier DC 1300.4 22-2 (1) Ultimate Fighting Championship Male 17 Aug 2019 265
3 Stipe Miocic 1245.9 24-3 Ultimate Fighting Championship Male 17 Aug 2019 265
4 Ryan Bader Darth 1244.7 30-5 (1) Bellator MMA Male 26 Jan 2019 265
5 Khabib Nurmagomedov The Eagle 1234.8 28-0 Ultimate Fighting Championship Male 07 Sep 2019 155
6 Fedor Emelianenko The Last Emperor 1233.7 40-6 (1) Bellator MMA Male 26 Jan 2019 265
7 Lyoto Machida The Dragon 1227.9 26-8 Bellator MMA Male 14 Jun 2019 185, 205
8 Patricio Pitbull 1222 29-4 Bellator MMA Male 11 May 2019 145, 155
9 Demetrious Johnson Mighty Mouse 1219.2 31-3-1 ONE Championship Male 02 Aug 2019 125, 135
10 ▲+3 Justin Gaethje The Highlight 1218 ▲+16.5 27-2 Ultimate Fighting Championship Male 14 Sep 2019 155
11 ▼-1 Frankie Edgar The Answer 1213.7 23-7-1 Ultimate Fighting Championship Male 27 Jul 2019 145
12 ▼-1 Gegard Mousasi The Dreamcatcher 1209.4 45-8-1 Bellator MMA Male 22 Jun 2019 185
13 ▼-1 Max Holloway Blessed 1203.1 22-4 Ultimate Fighting Championship Male 27 Jul 2019 145, 155
14 Cain Velasquez 1199.4 14-3 Ultimate Fighting Championship Male 17 Feb 2019 265
15 Ben Askren Funky 1198.3 19-1 (1) Ultimate Fighting Championship Male 06 Jul 2019 170
16 José Aldo Junior 1197.7 28-5 Ultimate Fighting Championship Male 11 May 2019 145
17 Phil Davis Mr. Wonderful 1197.5 22-5 (1) Bellator MMA Male 27 Apr 2019 205
18 Junior dos Santos Cigano 1196.6 21-6 Ultimate Fighting Championship Male 29 Jun 2019 265
19 ▲+1 Andre Harrison The Bull 1194.5 24-1-1 Professional Fighters League Male 25 Jul 2019 145
20 ▼-1 Donald Cerrone Cowboy 1192.4 ▼-3.4 36-13 (1) Ultimate Fighting Championship Male 14 Sep 2019 155, 170
21 Joseph Benavidez The Beefcake 1191.2 28-5 Ultimate Fighting Championship Male 29 Jun 2019 125
23 Demian Maia 1190 27-9 Ultimate Fighting Championship Male 29 Jun 2019 170
24 Dustin Poirier The Diamond 1188.4 28-6 (1) Ultimate Fighting Championship Male 07 Sep 2019 155
25 Kamaru Usman The Nigerian Nightmare 1187.3 17-1 Ultimate Fighting Championship Male 02 Mar 2019 170
26 Eddie Alvarez The Underground King 1183.2 30-7 (1) ONE Championship Male 02 Aug 2019 155, 170