Ratings for events through April 30, 2013. All weight classes/pound-for-pound.
Key: Fighter won recent fight ; Fighter lost recent fight ; Inactive: last win more than one year ago
| March Rank |
May Rank |
Fighter | WC | Rating | Rated Record | March-April results |
| 1 | 1 | Georges St. Pierre | WW | 95.98 | 22-2-0 | Beat #27 Nick Diaz |
| 2 | 2 | Anderson Silva | MW | 87.46 | 30-4-0 | |
| 3 | 3 | Jon Jones | LH | 87.22 | 12-1-0 | Beat #33 Chael Sonnen |
| 5 | 4 | Benson Henderson | LW | 72.26 | 11-1-0 | Beat #6 Gilbert Melendez |
| 4 | 5 | Cain Velasquez | HW | 63.51 | 8-1-0 | |
| 7 | 6 | Antonio Silva | HW | 54.96 | 15-4-0 | |
| 8 | 7 | Lyoto Machida | LH | 54.27 | 16-3-0 | |
| 9 | 8 | Fabricio Werdum | HW | 53.77 | 15-5-1 | |
| 10 | 9 | Daniel Cormier | HW | 53.15 | 9-0-0 | Beat #41 Frank Mir |
| 13 | 10 | Johny Hendricks | WW | 49.33 | 11-1-0 | Beat #26 Carlos Condit |
| 12 | 11 | Jose Aldo | FW | 46.69 | 14-1-0 | |
| 11 | 12 | Alistair Overeem | HW | 46.22 | 29-12-0 | last win -16 months. |
| 14 | 13 | Junior dos Santos | HW | 43.90 | 9-1-0 | |
| 16 | 14 | Eddie Alvarez | LW | 40.48 | 18-3-0 | |
| 6 | 15 | Gilbert Melendez | LW | 40.40 | 19-3-0 | Lost to #5 Benson Henderson |
| 15 | 16 | Dan Henderson | LH | 39.81 | 29-9-0 | last win -17 months. |
| 18 | 17 | Shinya Aoki | LW | 36.49 | 26-5-0 | Beat #220 Kotetsu Boku |
| 17 | 18 | Fedor Emelianenko | HW | 35.50 | 27-4-0 | |
| 20 | 19 | Antonio Rogerio Nogueira | LH | 34.37 | 19-5-0 | |
| 21 | 20 | Alexander Gustafsson | LH | 33.97 | 8-1-0 | |
| 19 | 21 | Dominick Cruz | BW | 33.79 | 11-1-0 | last win -18 months. |
| 22 | 22 | Gray Maynard | LW | 31.81 | 10-1-1 | |
| 23 | 23 | Michael Chandler | LW | 31.21 | 5-0-0 | |
| 24 | 24 | Ben Askren | WW | 31.07 | 6-0-0 | |
| 25 | 25 | Chris Weidman | MW | 30.52 | 5-0-0 | |
| 32 | 26 | Pat Healy | LW | 30.37 | 16-16-0 | Beat #84 Jim Miller |
| 37 | 27 | Jake Ellenberger | WW | 29.43 | 15-6-0 | Beat #77 Nate Marquardt |
| 28 | 28 | Rashad Evans | LH | 29.36 | 19-3-1 | last win -15 months. |
| 29 | 29 | Luke Rockhold | MW | 28.91 | 6-0-0 | |
| 36 | 30 | Pat Curran | FW | 28.69 | 8-1-0 | Beat #105 Shahbulat Shamhalaev |
| 30 | 31 | Demian Maia | WW | 28.57 | 15-4-0 | |
| 31 | 32 | Gegard Mousasi | LH | 28.07 | 22-3-2 | |
| 34 | 33 | Tatsuya Kawajiri | LW | 26.49 | 25-6-2 | |
| 35 | 34 | Anthony Pettis | LW | 26.38 | 9-2-0 | |
| 38 | 35 | Jake Shields | WW | 25.57 | 24-6-1 | |
| 39 | 36 | Bibiano Fernandes | FW | 25.20 | 10-1-0 | |
| 40 | 37 | Constantinos Philippou | MW | 25.13 | 5-1-0 | |
| 75 | 38 | Yushin Okami | MW | 24.76 | 19-6-0 | Beat #56 Hector Lombard |
| 42 | 39 | Ricardo Lamas | FW | 24.54 | 7-2-0 | |
| 43 | 40 | Mauricio Rua | LH | 24.46 | 18-7-0 | |
| 45 | 41 | Tarec Saffiedine | MW | 23.94 | 4-1-0 | |
| 46 | 42 | Ronaldo Souza | MW | 23.69 | 12-2-0 | |
| 47 | 43 | Demetrious Johnson | BW | 23.49 | 6-1-1 | |
| 44 | 44 | Josh Barnett | HW | 23.47 | 30-6-0 | last win -19 months. |
| 48 | 45 | Rory MacDonald | WW | 23.42 | 7-1-0 | |
| 50 | 46 | Glover Teixeira | LH | 23.22 | 11-1-0 | |
| 52 | 47 | Ryan Bader | LH | 23.00 | 7-3-0 | |
| 53 | 48 | Vitor Belfort | MW | 22.98 | 21-10-0 | |
| 54 | 49 | Forrest Griffin | LH | 22.35 | 17-7-0 | |
| 55 | 50 | Martin Kampmann | WW | 22.01 | 18-7-0 | |
| 57 | 51 | Alexander Shlemenko | MW | 21.76 | 13-2-0 | |
| 59 | 52 | Ronny Markes | MW | 21.54 | 3-0-0 | |
| 191 | 53 | Dong Hyun Kim | WW | 21.11 | 10-2-2 | Beat #49 Siyar Bahadurzada |
| 26 | 54 | Carlos Condit | WW | 21.06 | 20-7-0 | Lost to #13 Johny Hendricks |
| 58 | 55 | Brock Lesnar | HW | 20.97 | 4-2-0 | last win -33 months. |
| 27 | 56 | Nick Diaz | WW | 20.97 | 20-9-0 | Lost to #1 Georges St. Pierre |
| 60 | 57 | Mike Pyle | WW | 20.96 | 14-8-1 | |
| 61 | 58 | Antonio Rodrigo Nogueira | HW | 20.77 | 32-7-1 | |
| 62 | 59 | Renan Barao | BW | 20.70 | 3-0-0 | |
| 68 | 60 | Anthony Johnson | HW | 20.61 | 12-5-0 | Beat #694 Andrei Arlovski |
| 64 | 61 | Cole Konrad | HW | 20.38 | 5-0-0 | |
| 65 | 62 | Tim Boetsch | MW | 20.34 | 8-4-0 | |
| 66 | 63 | T.J. Grant | LW | 20.23 | 8-3-0 | |
| 69 | 64 | Khabib Nurmagomedov | LW | 20.05 | 3-0-0 | |
| 67 | 65 | Robert Peralta | LW | 19.71 | 1-0-0 | last win -17 months. |
| 70 | 66 | Mark Munoz | MW | 19.58 | 7-2-0 | last win -17 months. |
| 71 | 67 | Georgi Karakhanyan | FW | 19.54 | 5-2-0 | Beat #NR Din Thomas |
| 72 | 68 | Jon Fitch | WW | 19.53 | 19-3-1 | |
| 73 | 69 | Dennis Siver | LW | 19.37 | 10-4-0 | |
| 209 | 70 | Jorge Masvidal | LW | 19.33 | 21-7-0 | Beat #63 Tim Means |
| 74 | 71 | Clay Guida | FW | 19.29 | 17-10-0 | |
| new | 72 | Koji Ando | LW | 19.07 | 1-0-0 | Beat #51 Jadamba Narantungalag |
| 120 | 73 | Mark Hunt | HW | 19.01 | 7-6-0 | Beat #108 Stefan Struve |
| 76 | 74 | Mamed Khalidov | MW | 18.94 | 9-1-2 | |
| 78 | 75 | Brian Ebersole | WW | 18.81 | 29-14-1 | |
| 80 | 76 | Tyron Woodley | WW | 18.77 | 7-1-0 | |
| 33 | 77 | Chael Sonnen | LH | 18.55 | 24-13-1 | Lost to #3 Jon Jones |
| 100 | 78 | Joseph Benavidez | BW | 18.54 | 10-3-0 | Beat #320 Darren Uyenoyama |
| 118 | 79 | Michael Bisping | MW | 18.52 | 14-5-0 | Beat #140 Alan Belcher |
| 208 | 80 | Diego Sanchez | WW | 18.27 | 19-5-0 | Beat #79 Takanori Gomi |
| 85 | 81 | Andrey Koreshkov | WW | 18.14 | 3-0-0 | |
| 81 | 82 | Sean Sherk | LW | 18.14 | 31-4-1 | last win -31 months. |
| 106 | 83 | Emanuel Newton | LH | 18.10 | 7-4-0 | Beat #269 Mikhail Zayats |
| 88 | 84 | Jason High | WW | 17.92 | 7-2-0 | |
| 233 | 85 | Josh Thomson | LW | 17.91 | 18-5-0 | Beat #82 Nate Diaz |
| 145 | 86 | David Rickels | WW | 17.81 | 4-1-0 | Beat #130 Saad Awad |
| 90 | 87 | Daniel Straus | LW | 17.80 | 5-1-0 | |
| 165 | 88 | Chad Mendes | FW | 17.77 | 6-1-0 | Beat #116 Darren Elkins |
| 86 | 89 | Frankie Edgar | FW | 17.68 | 9-4-1 | last win -18 months. |
| 91 | 90 | Rashid Magomedov | WW | 17.68 | 3-0-0 | |
| 92 | 91 | Eduardo Dantas | BW | 17.59 | 6-2-0 | |
| 93 | 92 | Rafael dos Anjos | LW | 17.51 | 9-4-0 | |
| 94 | 93 | Attila Vegh | LH | 17.49 | 4-0-2 | |
| 97 | 94 | Chan Sung Jung | FW | 17.41 | 5-3-0 | |
| 89 | 95 | Hiroyuki Takaya | FW | 17.41 | 11-10-1 | last win -16 months. |
| 163 | 96 | Yusuke Yachi | FW | 17.29 | 4-0-0 | Beat #141 Yuji Hoshino |
| 41 | 97 | Frank Mir | HW | 17.08 | 15-7-0 | Lost to #10 Daniel Cormier |
| 98 | 98 | Robbie Lawler | MW | 17.06 | 21-9-0 | |
| 96 | 99 | Quinton Jackson | LH | 17.00 | 24-11-0 | last win -23 months. |
| 99 | 100 | Shinya Murofushi | BW | 16.99 | 2-0-0 |
