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.


Key
Currently active and at their highest rating.
Currently active but not at their highest rating.
Inactive fighter.

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 Peak Date Weight Class
1 Jon Jones Bones 1335.4 25-1 (1) Ultimate Fighting Championship Male 06 Jul 2019 205
2 Daniel Cormier DC 1315.6 22-2 (1) Ultimate Fighting Championship Male 03 Nov 2018 265
3 Georges St. Pierre Rush 1282.1 26-2 Ultimate Fighting Championship Male 04 Nov 2017 170
4 Fedor Emelianenko The Last Emperor 1265.3 40-6 (1) Bellator MMA Male 07 Nov 2009 265
5 Stipe Miocic 1245.9 24-3 Ultimate Fighting Championship Male 17 Aug 2019 265
6 Ryan Bader Darth 1244.7 30-5 (1) Bellator MMA Male 26 Jan 2019 265
7 Khabib Nurmagomedov The Eagle 1234.8 28-0 Ultimate Fighting Championship Male 07 Sep 2019 155
8 Patricio Pitbull 1231.9 30-4 Bellator MMA Male 28 Sep 2019 145, 155
9 Lyoto Machida The Dragon 1227.9 26-9 Bellator MMA Male 14 Jun 2019 185, 205
10 Demetrious Johnson Mighty Mouse 1227.8 32-3-1 ONE Championship Male 12 Oct 2019 125, 135
11 Rashad Evans Suga 1225.4 21-8-1 Ultimate Fighting Championship Male 28 Jan 2012 205
12 Chris Weidman All American 1225.2 14-4 Ultimate Fighting Championship Male 23 May 2015 185
13 Ben Askren Funky 1224 19-1 (1) Ultimate Fighting Championship Male 02 Mar 2019 170
14 Frankie Edgar The Answer 1221.5 23-7-1 Ultimate Fighting Championship Male 21 Apr 2018 145
15 Gegard Mousasi The Dreamcatcher 1218.9 46-8-1 Bellator MMA Male 28 Sep 2019 185
16 Cain Velasquez 1218.5 14-3 Ultimate Fighting Championship Male 19 Oct 2013 265
17 Justin Gaethje The Highlight 1218 27-2 Ultimate Fighting Championship Male 14 Sep 2019 155
18 Antônio Rodrigo Nogueira Minotauro 1216.9 34-10 (1) Ultimate Fighting Championship Male 02 Feb 2008 265
19 José Aldo Junior 1206.9 28-5 Ultimate Fighting Championship Male 09 Jul 2016 145
20 Anderson Silva The Spider 1206.2 34-10 (1) Ultimate Fighting Championship Male 13 Oct 2012 185
21 Junior dos Santos Cigano 1205.7 21-6 Ultimate Fighting Championship Male 09 Mar 2019 265
22 Josh Barnett The Warmaster 1204.2 34-8 Ultimate Fighting Championship Male 31 Aug 2013 265
23 Phil Davis Mr. Wonderful 1204.2 22-5 (1) Bellator MMA Male 25 May 2018 205
24 Max Holloway Blessed 1203.1 22-4 Ultimate Fighting Championship Male 27 Jul 2019 145, 155
25 Anthony Johnson Rumble 1202 22-6 Ultimate Fighting Championship Male 20 Aug 2016 170, 205