';
| Fighter | Nickname | Height | Weight | Association | |
| A.J. Nelson | 6'5" (1.96 m) |
280 lbs (127.01 kg) |
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| A.J. Mattia | 6'4" (1.93 m) |
315 lbs (142.88 kg) |
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| Aaron Spomer | 0'0" (0 m) |
304 lbs (137.89 kg) |
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| Aaron Leopold | 0'0" (0 m) |
327 lbs (148.32 kg) |
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| Aaron Delgado | 0'0" (0 m) |
300 lbs (136.08 kg) |
Fight Sports Daytona | ||
| Aaron Williams | 6'5" (1.96 m) |
280 lbs (127.01 kg) |
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| Abdelrahman Shalan | "Osunaarashi Kintaro" | 6'2" (1.88 m) |
353 lbs (160.12 kg) |
UWF USA | |
| Abdul Keita | 0'0" (0 m) |
270 lbs (122.47 kg) |
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| Abraham Garcia | 5'10" (1.78 m) |
290 lbs (131.54 kg) |
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| Adalhamir Pedrosa | 0'0" (0 m) |
320 lbs (145.15 kg) |
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| Adam Rivera | "El Toro" | 5'6" (1.68 m) |
275 lbs (124.74 kg) |
The Shop MMA | |
| Adam Braidwood | "The BoogeyMan" | 6'4" (1.93 m) |
270 lbs (122.47 kg) |
Pro Camp | |
| Adam Church | "The Wall" | 5'11" (1.8 m) |
420 lbs (190.51 kg) |
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| Adam Hamner | 6'0" (1.83 m) |
305 lbs (138.35 kg) |
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| Adam Morris | 0'0" (0 m) |
315 lbs (142.88 kg) |
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| Adthapong Saengtep | "Benz Noii" | 6'5" (1.96 m) |
312 lbs (141.52 kg) |
Freelance | |
| Ahmed Al-Rubaye | 6'2" (1.88 m) |
275 lbs (124.74 kg) |
Branibor Team Baghdad | ||
| Aisea Levatau | 0'0" (0 m) |
278 lbs (126.1 kg) |
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| Akemi Torisu | 5'5" (1.65 m) |
363 lbs (164.65 kg) |
All Japan Women's Pro-Wrestling | ||
| Alain Fourny | 6'6" (1.98 m) |
280 lbs (127.01 kg) |
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