| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Nandor | Guelmino | The Hun | 6' 3" | 230 lbs. | -- | 11 | 5 | 1 | ||
| Fabricio | Guerreiro | 5' 10" | 145 lbs. | -- | 21 | 5 | 0 | |||
| Rainn | Guerrero | Purple Rainn | 5' 6" | 125 lbs. | 65.0" | Orthodox | 5 | 2 | 0 | |
| Shannon | Gugerty | 5' 10" | 155 lbs. | 71.0" | Orthodox | 15 | 7 | 0 | ||
| Clay | Guida | The Carpenter | 5' 7" | 155 lbs. | 70.0" | Orthodox | 38 | 21 | 0 | |
| Jason | Guida | 5' 10" | 214 lbs. | -- | 19 | 28 | 0 | |||
| Melvin | Guillard | The Young Assassin | 5' 9" | 155 lbs. | 71.0" | Orthodox | 32 | 18 | 2 | |
| Chris | Guillen | 6' 0" | 240 lbs. | -- | Orthodox | 13 | 16 | 0 | ||
| Marcelo | Guimaraes | Magrao | 6' 0" | 185 lbs. | 73.0" | Orthodox | 9 | 2 | 1 | |
| Leonardo | Guimaraes | Leleco | 6' 0" | 185 lbs. | -- | Orthodox | 11 | 5 | 0 | |
| Brad | Gumm | 5' 11" | 170 lbs. | -- | Orthodox | 10 | 6 | 1 | ||
| John | Gunderson | Quick Guns | 5' 9" | 155 lbs. | 69.0" | Orthodox | 35 | 16 | 2 | |
| John | Gunther | The Machine | 5' 9" | 155 lbs. | 72.0" | Orthodox | 5 | 1 | 0 | |
| Jorge | Gurgel | 5' 7" | 155 lbs. | 69.0" | Orthodox | 14 | 10 | 0 | ||
| Fabio | Gurgel | 6' 0" | 205 lbs. | -- | Orthodox | 3 | 2 | 0 | ||
| Bogdan | Guskov | Czarevitch | 6' 3" | 205 lbs. | 76.0" | Orthodox | 16 | 3 | 0 | |
| Gugun | Gusman | The Tiger | 5' 7" | 135 lbs. | 68.0" | Orthodox | 8 | 4 | 0 | |
| Andre | Gusmao | 6' 0" | 205 lbs. | -- | Orthodox | 6 | 3 | 0 | ||
| Alexander | Gustafsson | The Mauler | 6' 5" | 205 lbs. | 79.0" | Orthodox | 18 | 8 | 0 | |
| Andreas | Gustafsson | Bane | -- | 185 lbs. | -- | 10 | 2 | 0 | ||
| Justin | Guthrie | 6' 1" | 170 lbs. | -- | 18 | 9 | 0 | |||
| Horacio | Gutierrez | The Punisher | 5' 10" | 145 lbs. | -- | 4 | 3 | 0 | ||
| Chris | Gutierrez | El Guapo | 5' 9" | 135 lbs. | 67.0" | Orthodox | 20 | 6 | 2 | |
| Mando | Gutierrez | El Toro | 5' 6" | 135 lbs. | 70.0" | Southpaw | 7 | 2 | 0 |