"Abrek"

Shamil Abdurakhimov

Heavyweight

20-5-0 (W-L-D)

"White Bear"

Klidson Abreu

Light Heavyweight

15-5-0 (W-L-D)

"The Last Stylebender"

Israel Adesanya

Middleweight

19-0-0 (W-L-D)

Mariya Agapova

Women's Flyweight

0-0-0 (W-L-D)

"Angel of Death"

Kevin Aguilar

Featherweight

17-3-0 (W-L-D)

"Wolverine"

Omari Akhmedov

Middleweight

20-4-1 (W-L-D)

"The Mongolian Knight"

Heili Alateng

Bantamweight

2-0-0 (W-L-D)

"Marajo"

Iuri Alcantara

Bantamweight

35-10-0 (W-L-D)

Irene Aldana

Women's Bantamweight

12-5-0 (W-L-D)

Jose Aldo

Bantamweight

28-6-0 (W-L-D)

JJ Aldrich

Women's Flyweight

8-4-0 (W-L-D)