| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Patrick | Kaase | Kamikaze | 5' 9" | 185 lbs. | -- | 1 | 2 | 0 | ||
| Emily | Kagan | 5' 3" | 115 lbs. | -- | 3 | 3 | 0 | |||
| Oron | Kahlon | 5' 8" | 135 lbs. | 70.0" | Orthodox | 16 | 1 | 0 | ||
| Kaiwen | The Underdog | 5' 9" | 145 lbs. | 72.0" | Switch | 12 | 6 | 0 | ||
| Sirwan | Kakai | Zohan | 5' 5" | 135 lbs. | -- | Orthodox | 12 | 5 | 0 | |
| Saidyokub | Kakhramonov | 5' 8" | 135 lbs. | 69.0" | Orthodox | 10 | 3 | 0 | ||
| Geza | Kalman | 6' 1" | 200 lbs. | -- | 4 | 9 | 0 | |||
| Bryson | Kamaka | 5' 11" | 170 lbs. | -- | Orthodox | 12 | 20 | 1 | ||
| Kai | Kamaka | The Fighting Hawaiian | 5' 7" | 145 lbs. | 69.0" | Orthodox | 8 | 4 | 1 | |
| Shuya | Kamikubo | Stealth | 5' 5" | 135 lbs. | 68.0" | Switch | 13 | 2 | 1 | |
| Martin | Kampmann | The Hitman | 6' 0" | 170 lbs. | 72.0" | Orthodox | 20 | 7 | 0 | |
| Koya | Kanda | Bushido | 5' 9" | 145 lbs. | 75.0" | Southpaw | 12 | 5 | 0 | |
| Bharat | Kandare | Daring | 5' 7" | 135 lbs. | 72.0" | Orthodox | 5 | 3 | 0 | |
| Hiromitsu | Kanehara | 5' 10" | 200 lbs. | -- | Orthodox | 19 | 27 | 5 | ||
| Masanori | Kanehara | 5' 7" | 135 lbs. | 67.0" | Orthodox | 26 | 12 | 5 | ||
| Ken | Kaneko | 6' 0" | 161 lbs. | -- | Orthodox | 0 | 3 | 0 | ||
| Denis | Kang | 5' 11" | 185 lbs. | 77.0" | Orthodox | 35 | 16 | 2 | ||
| Kyung Ho | Kang | Mr. Perfect | 5' 9" | 135 lbs. | 73.0" | Orthodox | 19 | 11 | 0 | |
| Manel | Kape | StarBoy | 5' 5" | 125 lbs. | 68.0" | Southpaw | 19 | 7 | 0 | |
| David | Kaplan | Diamond | 5' 7" | 155 lbs. | -- | Orthodox | 3 | 4 | 0 | |
| Kai | Kara-France | Don't Blink | 5' 4" | 125 lbs. | 69.0" | Orthodox | 25 | 11 | 0 | |
| Georgi | Karakhanyan | Insane | 5' 8" | 145 lbs. | -- | 26 | 7 | 1 | ||
| Alex | Karalexis | The Assassin | 5' 8" | 155 lbs. | 66.0" | Orthodox | 10 | 6 | 0 | |
| Ernesta | Kareckaite | Heavy-Handed | 5' 9" | 125 lbs. | 71.0" | Orthodox | 5 | 1 | 1 | |
| Impa | Kasanganay | Tshilobo | 5' 11" | 170 lbs. | 75.0" | Orthodox | 9 | 2 | 0 |