Wuttichai Khaihin (; born March 14, 2003), known professionally as Rambolek Chor.Ajalaboon () is a Thai Muay Thai fighter. He currently competes in ONE Championship, where he is the current ONE Bantamweight Muay Thai World Champion.
Rambolek started training in Muay Thai at the age of 7 in his native Chaiyaphum province.
On March 7, 2021, Rambolek faced Nontachai Jitmuangnon on the MuayDee WIthiThai promotion at the Or.Tor.Gor3 Stadium. He won the fight by decision.
On April 25, 2021, Rambolek defeated Babak Haghi by decision at THAI FIGHT DMHTT.
Rambolek faced Alessandro Sara at THAI FIGHT Strong on July 4, 2021. He lost the fight by decision.
On May 1, 2022, Rambolek faced Yod-ET PTT Thongthawee for the vacant Channel 7 Stadium 140 lbs title. He won the fight by decision.
Rambolek was scheduled to face Siwakorn Kiatcharoenchai at the Channel 7 Stadium on July 7, 2022. The fight ended in a draw after five rounds.
On October 1, 2022, Rambolek faced Kongklai AnnyMuayThai on Muay Thai Vithee TinThai + Kiatpetch in the Buriram province. He won the fight by decision.
On August 13, 2022, Rambolek defeated Kulabdam Sor.Jor.Piek-U-Thai by decision at the Petchbuncha Stadium.
Rambolek made his ONE Championship debut at ONE Friday Fights 22 on June 23, 2023, against Theeradet Chor.Hapayak. He won the fight by second-round knockout.
On April 21, 2023, Rambolek faced Zhang Chenglong at ONE Friday Fights 13. He won the fight by second-round technical knockout. After this victory Rambolek received a ONE Championship multi fight contract worth $100,000.
Rambolek faced Fariyar Aminipour at ONE Friday Fights 22 on June 23, 2023. He lost the bout by split decision.
On February 9, 2024, Rambolek faced Soner Sen at ONE Friday Fights 51. He won the fight by unanimous decision.
On March 8, 2025, Rambolek defeated Parham Gheirati by second-round technical knockout at ONE Fight Night 29. He received a $50,000 performance bonus for this win.
On January 24, 2026, Rambolek faced Abdulla Dayakaev at ONE Fight Night 39. He won the fight by second-round knockout, a victory that earned him a performance bonus.
Rambolek was scheduled to challenge Nabil Anane for his ONE Bantamweight (145 lbs) Muay Thai World title on March 20, 2026, at ONE Friday Fights 147. He won the fight by unanimous decision after scoring two knockdowns.
|- style="background:#cfc;" | 2026-03-20 || Win||align=left| Nabil Anane || ONE Friday Fights 147 || Bangkok, Thailand || Decision (Unanimous) ||5 ||3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2026-01-24 || Win ||align=left| Abdulla Dayakaev || ONE Fight Night 39 || Bangkok, Thailand || KO (Punch to the body)|| 2|| 2:41
|- style="background:#cfc;" | 2025-03-08 || Win ||align=left| Parham Gheirati || ONE Fight Night 29 || Bangkok, Thailand || TKO (Punches) || 2 || 1:15
|- style="background:#cfc;" | 2024-08-03 || Win||align=left| Craig Coakley|| ONE Fight Night 24 || Bangkok, Thailand || Decision (Unanimous) || 3 || 3:00
|- style="background:#cfc;" | 2024-02-09 || Win||align=left| Soner Sen|| ONE Friday Fights 51, Lumpinee Stadium || Bangkok, Thailand || Decision (Unanimous) || 3 || 3:00
|- style="background:#fbb" | 2023-09-29|| Loss ||align=left| Asa Ten Pow || ONE Fight Night 14 || Kallang, Singapore || KO (Right cross + headkick) || 3||0:25
|- style="background:#fbb" | 2023-06-23|| Loss ||align=left| Fariyar Aminipour || ONE Friday Fights 22, Lumpinee Stadium || Bangkok, Thailand || Decision (Split) || 3||3:00
|- style="text-align:center; background:#cfc;" | 2023-04-21 | Win | align="left" | Zhang Chenglong | ONE Friday Fights 13 | Bangkok, Thailand | TKO (Punches) | 2 | 1:32
|- style="background:#cfc;" | 2023-03-03|| Win ||align=left| Theeradet Chor.Hapayak || ONE Friday Fights 7, Lumpinee Stadium || Bangkok, Thailand || KO (Right hook) || 2 || 0:10
|- style="background:#cfc;" | 2023-01-07 || Win ||align=left| Kongklai AnnyMuayThai || Ruamponkon Samui: Samui Super Fight, Phetchbuncha Stadium|| Ko Samui, Thailand ||Decision || 5 || 3:00 |-
|- style="background:#cfc" | 2022-12-10 || Win ||align=left| Darky Nokkhao KM.11 || Ruamponkon Samui, Petchbuncha Stadium || Ko Samui, Thailand || Decision || 5 ||3:00
|- style="background:#fbb" | 2022-10-01 || Loss ||align=left| Kongklai AnnyMuayThai || Muay Thai Vithee TinThai + Kiatpetch || Buriram province, Thailand || Decision || 5 || 3:00
|- style="background:#cfc" | 2022-08-13 ||Win ||align=left| Kulabdam Sor.Jor.Piek-U-Thai || Ruamponkon Samui, Petchbuncha Stadium || Ko Samui, Thailand || Decision || 5 ||3:00
|- style="background:#c5d2ea;" | 2022-07-10|| Draw ||align=left| Siwakorn Kiatcharoenchai || Channel 7 Stadium ||Bangkok, Thailand ||Decision || 5 || 3:00
|- style="background:#cfc;" | 2022-05-01|| Win ||align=left| Yod-ET PTT Thongthawee || Channel 7 Stadium ||Bangkok, Thailand ||Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2022-03-13|| Win ||align=left| Thanonchai Fairtex || Channel 7 Stadium ||Bangkok, Thailand ||Decision || 5 || 3:00
|- style="background:#fbb" | 2022-01-23|| Loss ||align=left| PhetUtong Or.Kwanmuang || Channel 7 Stadium || Bangkok, Thailand || Decision || 5 ||3:00
|- style="background:#cfc;" | 2021-12-26|| Win ||align=left| Panpayak Sitchefboontham || Channel 7 Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc" | 2021-11-14 ||Win ||align=left| Duangsompong Jitmuangnon || MuayDee WIthiThai, Or.Tor.Gor3 Stadium || Nonthaburi province, Thailand || Decision || 5 ||3:00
|- style="background:#fbb;" | 2021-07-04|| Loss ||align=left| Alessandro Sara || THAI FIGHT Strong || Pattaya, Thailand || Decision || 3 || 3:00
|- style="background:#cfc;" | 2021-04-25|| Win || align="left" | Babak Haghi || THAI FIGHT DMHTT || Samut Sakhon, Thailand || TKO (Punches)|| 1 ||
|- style="background:#cfc" | 2021-03-07 || Win ||align=left| Nontachai Jitmuangnon || MuayDee WIthiThai, Or.Tor.Gor3 Stadium || Nonthaburi province, Thailand || Decision || 5 ||3:00
|- style="text-align:center; background:#cfc;" | 2020-12-13 || Win ||align=left| Alessandro Sara || Muaydeevitheethai, Blue Arena || Samut Prakan, Thailand || Decision || 5 || 3:00
|- style="text-align:center; background:#fbb;" | 2020-10-25 || Loss ||align=left| Petchmahachon Jitmuangnon || Muaydeevitheethai, Blue Arena || Samut Prakan, Thailand || Decision || 5 || 3:00
|- style="text-align:center; background:#cfc;" | 2020-10-04 || Win ||align=left| Saenwangchai J.S.P. || Muaydeevitheethai, Blue Arena || Samut Prakan, Thailand || Decision || 5 || 3:00
|- style="text-align:center; background:#c5d2ea;" | 2020-08-25 || Draw ||align=left| Anulak Tded99 || Chefboontham, Thanakorn Boxing Stadium || Nakhon Pathom province, Thailand || Decision || 5 || 3:00
|- style="text-align:center; background:#cfc;" | 2020-07-18 || Win ||align=left| Suaphet SinghodGym || OneSongchai, Thanakorn Boxing Stadium || Nakhon Pathom province, Thailand || Decision || 5 || 3:00
|- style="text-align:center; background:#cfc;" | 2020-03-08 || Win ||align=left| Chandej Kor.Adisorn || Muaydeevitheethai, Blue Arena || Samut Prakan, Thailand || KO || 4 || |- | colspan=9 | Legend: