Guy Delumeau (born August 18, 1981) is an American mixed martial artist currently competing in the Lightweight division.
Delumeau attended Pacific University.
|- | Win | align=center| 22-13-3 | Juri Ohara | Decision (majority) | DEEP: 81 Impact | | align=center| 2 | align=center| 5:00 | Tokyo, Japan |<small>Return to Lightweight.</small> |- | Loss | align=center| 21-13-3 | Hiroto Uesako | TKO (punches) | DEEP: 78 Impact | | align=center| 2 | align=center| 0:23 | Tokyo, Japan | |- | Loss | align=center| 21-12-3 | Nazareno Malegarie | Decision (unanimous) | Pancrase: 281 | | align=center| 3 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 21-11-3 | Satoshi Inaba | Submission (twister) | Pancrase: 279 | | align=center| 1 | align=center| 1:40 | Tokyo, Japan | |- | Loss | align=center| 20-11-3 | Juntaro Ushiku | TKO (knee injury) | Pancrase: 266 | | align=center| 2 | align=center| 0:40 | Tokyo, Japan | |- | Loss | align=center| 20-10-3 | Hiroyuki Takaya | TKO (punches) | Pancrase: 266 | | align=center| 3 | align=center| 4:11 | Tokyo, Japan | |- | Win | align=center| 20-9-3 | Akitoshi Tamura | Decision (split) | Pancrase: 264 | | align=center| 3 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 19-9-3 | Tomonari Kanomata | Decision (unanimous) | Pancrase: 260 | | align=center| 3 | align=center| 5:00 | Tokyo, Japan | |- | Loss | align=center| 18-9-3 | Yuki Baba | TKO (knee) | Pancrase: 257 | | align=center| 1 | align=center| 0:30 | Yokohama, Kanagawa, Japan | |- | Win | align=center| 18-8-3 | Hiroyuki Oshiro | Decision (majority) | Pancrase: 255 | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 17-8-3 | Yojiro Uchimura | Submission (guillotine choke) | Pancrase: 248 | | align=center| 2 | align=center| 2:28 | Tokyo, Japan | |- | Loss | align=center| 16-8-3 | Dustin Kimura | KO (punch) | PXC: Pacific Xtreme Combat 34 | | align=center| 3 | align=center| 4:44 | Quezon City, National Capital Region, Philippines | |- | Loss | align=center| 16-7-3 | Jon Shores | Decision (unanimous) | Pancrase: Progress Tour 9 | | align=center| 3 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 16-6-3 | Yo Saito | KO (slam) | Pancrase: Progress Tour 7 | | align=center| 1 | align=center| 0:21 | Tokyo, Japan | |- | Draw | align=center| 15-6-3 | Wataru Miki | Draw (split) | Shooto: Survivor Tournament Final | | align=center| 3 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 15-6-2 | Issei Tamura | Decision (majority) | | | align=center| 3 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 14-6-2 | Yuta Sasaki | Decision (unanimous) | | | align=center| 3 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 13-6-2 | Yusuke Yachi | Decision (unanimous) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Draw | align=center| 12-6-2 | Wataru Miki | Draw | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan |<small>Featherweight debut.</small> |- | Loss | align=center| 12-6-1 | Shinji Sasaki | Technical submission (armbar) | | | align=center| 1 | align=center| 2:54 | Okayama, Japan | |- | Win | align=center| 12-5-1 | Mateus Irie Nechio | Decision (unanimous) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 11-5-1 | Jin Kazeta | Decision (unanimous) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 10-5-1 | Komei Okada | KO (punch) | | | align=center| 2 | align=center| 3:44 | Fujimi, Saitama, Japan | |- | Draw | align=center| 9-5-1 | Yukinari Tamura | Draw | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Loss | align=center| 9-5 | Ikuo Usuda | Decision (majority) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 9-4 | Kunio Nakajima | Submission (rear-naked choke) | | | align=center| 2 | align=center| 1:33 | Tokyo, Japan | |- | Win | align=center| 8-4 | Paolo Milano | TKO (punches) | | | align=center| 2 | align=center| 4:09 | Tokyo, Japan | |- | Win | align=center| 7-4 | Hisaki Hiraishi | Decision (unanimous) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Loss | align=center| 6-4 | Kazuya Hirose | KO (spinning back fist) | | | align=center| 1 | align=center| 1:40 | Tokyo, Japan | |- | Win | align=center| 6-3 | Hideo Matsui | TKO (punches) | | | align=center| 2 | align=center| 4:02 | Tokyo, Japan | |- | Loss | align=center| 5-3 | Shinobu Miura | Decision (majority) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Loss | align=center| 5-2 | Hiroshi Shiba | Submission (triangle choke) | | | align=center| 1 | align=center| 1:58 | Tokyo, Japan | |- | Loss | align=center| 5-1 | Toshikazu Iseno | Decision (unanimous) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 5-0 | Minoru Tavares | TKO (punches) | | | align=center| 2 | align=center| 3:58 | Tokyo, Japan | |- | Win | align=center| 4-0 | Kenta Okuyama | TKO (injury) | | | align=center| 1 | align=center| 0:38 | Tokyo, Japan | |- | Win | align=center| 3-0 | Yuta Nabekubo | Decision (unanimous) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Win | align=center| 2-0 | Atsushi Hyuga | KO (punch) | | | align=center| 1 | align=center| 0:05 | Tokyo, Japan | |- | Win | align=center| 1-0 | Michiyuki Ishibashi | Submission (straight armbar) | | | align=center| 2 | align=center| 2:15 | Tokyo, Japan |
|- | Win | align=center| 2-0 | Brad Horner | Submission | SF 4: Fight For Freedom | | align=center| 2 | align=center| N/A | Gresham, Oregon, United States | |- | Win | align=center| 1-0 | Jesse Hamm | Submission | FCFF: Rumble at the Roseland 13 | | align=center| 1 | align=center| N/A | Portland, Oregon, United States |