Udomsak Onkaew (; born May 22, 1990), known professionally as Kaonar P.K. Saenchai Muaythaigym () is a Thai professional Muay Thai fighter. He is a former Lumpinee Stadium Light Flyweight Champion.

He was one of ten fighters on the shortlist of candidates for Sports Writers of Thailand 'Fighter of the Year' award for the period of May 7, 2018 to July 3, 2019.Cox, R. (2019, June 30). Ten fighters shortlisted for Muay Thai award. Asian MMA. https://asianmma.com/ten-fighters-shortlisted-for-muay-thais-biggest-award/

In 2020, The Nation ranked him as number 8 on their top 10 pound-for-pound best Muay Thai fighter list.The Top 10 Pound-for-Pound Fighters in Muay Thai. (2020, December 21). The Nation. https://www.nationthailand.com/life/30399985 He was a former Phoenix FC Super Featherweight champion. He has defeated some of the biggest names including wins over Rodtang Jitmuangnon, Saeksan Or. Kwanmuang, Superbank Mor Ratanabandit and Superlek Kiatmoo9.

Career He had a rematch with Rodtang Jitmuangnon in October 2020. The event took place at Siam Stadium in Bangkok and was for raising money for charity. Rodtang got the decision win.Cox, R. (2020, October 6). Rodtang beats Gaonar by decision. Asian MMA. https://asianmma.com/rodtang-beats-gaonar-by-decision-in-eagerly-anticipated-rematch/

At One Friday Nights 30, Kaonar was stopped by Saemapetch Fairtex. This was Kaonar's second time fighting in smaller gloves. Both exchanged body kicks until a jab from Saemapetch put Kaonar in his tracks.Goyder, J. (2023, August 26). Saemapetch stops Kaonar at ONE Friday Fights 30. Asian MMA. https://asianmma.com/saemapetch-stops-kaonar-at-one-friday-fights-30/

Titles and accomplishments

Phoenix Fighting Championship 2018 Phoenix FC Super Featherweight (130 lbs) Champion

Lumpinee Stadium 2007 Lumpinee Stadium Light Flyweight (108 lbs) Champion

Fight record

|- style="background:#fbb" | 2026-05-09 || Loss||align="left" | Jack Kennedy || Victory 16 || Newcastle, England || Decision (Unanimous) || 5 ||3:00

|- style="background:#fbb" | 2026-01-31 || Loss||align="left" | Sajad Sattari || Venum Fight 3 || Doha, Qatar || KO (Elbow) || 2 ||1:26 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2025-10-25|| Win ||align=left| Wang Jinbiao || Rajadamnern World Series || Bangkok, Thailand || Decision (Unanimous) ||3 ||3:00

|- style="background:#cfc;" | 2025-07-19|| Win ||align=left| Mohsen Fartotfard || Rajadamnern World Series || Bangkok, Thailand || Decision (Unanimous) ||3 ||3:00

|- style="background:#fbb;" | 2025-02-12|| Loss ||align=left| Capitan Petchyindee Academy|| WMC Samui, Phetchbuncha Stadium || Koh Samui, Thailand || |Decision || 5||3:00

|- style="background:#cfc;" | 2025-01-15|| Win||align=left| Rotpuang TOD Muay Thai || WMC Samui || Koh Samui, Thailand || Decision ||5 ||3:00

|- style="background:#fbb;" | 2023-11-24|| Loss ||align=left| Julio Lobo || ONE Friday Fights 42, Lumpinee Stadium || Bangkok, Thailand || KO (Punches) ||3 ||0:46

|- style="background:#fbb;" | 2023-08-25|| Loss||align=left| Saemapetch Fairtex || ONE Friday Fights 30, Lumpinee Stadium || Bangkok, Thailand || KO (Punches) ||1 ||2:09

|- style="background:#fbb;" | 2023-06-02|| Loss||align=left| Elbrus Osmanov || ONE Friday Fights 19, Lumpinee Stadium || Bangkok, Thailand || Decision (Unanimous) ||3 ||3:00

|- style="background:#cfc;" | 2023-03-11 || Win ||align=left| Sot Kevin || Suek Muay Thai Yuen Tin|| Surat Thani, Thailand ||Decision|| 5||3:00

|- style="background:#c5d2ea;" | 2023-02-27||Draw ||align=left| Moeun Sokhuch || Kun Khmer All Star || Phnom Penh, Cambodia || Decision || 3 || 3:00

|- style="background:#cfc;" | 2023-02-04 || Win ||align=left| Long Samnang || LWC Super Champ, Lumpinee Stadium || Bangkok, Thailand || Decision|| 3||3:00

|- style="background:#cfc;" | 2022-06-29 ||Win ||align=left| Yodlekpet Or.Atchariya || Muaythai Palangmai, Rajadamnern Stadium || Bangkok, Thailand || Decision|| 5||3:00

|- style="background:#cfc;" | 2022-04-16|| Win ||align=left| Yodlekpet Or.Atchariya || Pitaktham + Sor.Sommai|| Phayao province, Thailand || Referee stoppage||4 ||

|- style="background:#c5d2ea;" | 2022-03-11||Draw ||align=left| Yodlekpet Or.Atchariya || Pitaktham + Sor.Sommai + Palangmai || Songkhla province, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2021-12-30||Win ||align=left| Yodlekpet Or.Atchariya || Muay Thai SAT Super Fight WiteetinThai || Phuket, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2021-11-26|| Loss ||align=left| Rangkhao Wor.Sangprapai || Muaymanwansuk, Rangsit Stadium || Rangsit, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2021-04-08|| Loss ||align=left| Thaksinlek DN.MuayThaiGym || SuekMahakamMuayRuamPonKon Chana + Petchyindee|| Songkhla province, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2020-11-07|| Loss ||align=left| Superball Tded99 || SAT HERO SERIES, World Siam Stadium || Bangkok, Thailand || Decision ||5 ||3:00

|- style="background:#fbb;" | 2020-10-05|| Loss ||align=left| Rodtang Jitmuangnon || R1 UFA, World Siam Stadium || Bangkok, Thailand || Decision ||5 ||3:00

|- style="background:#cfc;" | 2020-09-13|| Win ||align=left| Henry Lee || Muay Thai Super Champ || Bangkok, Thailand || Decision || 3 || 3:00

|- style="background:#cfc;" | 2020-07-15|| Win ||align=left| Yodlekpet Or. Pitisak || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2020-02-27|| Win||align=left| Rodtang Jitmuangnon || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5|| 3:00

|- style="background:#cfc;" | 2019-12-08||Win||align=left| Phlaychumphon Sor. Srisomphong || BOM 2-6~THE Battle Of Muaythai SEASON II vol.6 || Tokyo, Japan || Decision (Unanimous) || 5 || 3:00

|- style="background:#cfc;" | 2019-11-07|| Win ||align=left| Saeksan Or. Kwanmuang|| Ruamponkon Prachin ||Prachinburi, Thailand|| Decision || 5 || 3:00

|- style="background:#c5d2ea;" | 2019-10-05||Draw||align=left| Superlek Kiatmuu9 || Yod Muay Thai Naikhanomton || Buriram, Thailand || Decision|| 5 || 3:00

|- style="background:#fbb;" | 2019-08-16|| Loss ||align=left| Panpayak Jitmuangnon || Supit + Sor. Sommai Birthday Fights || Songkla, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2019-05-29|| Loss || style="text-align:left;"| Saeksan Or. Kwanmuang || Rajadamnern Stadium || Bangkok, Thailand|| Decision || 5 || 3:00 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2019-04-25|| Win ||align=left| Superball Tded99 || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2018-12-26|| Win ||align=left| Superlek Kiatmuu9 || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2018-12-09|| Win ||align=left| Nobu Bravely || BOMXX - The Battle Of MuayThai 20- || Yokohama, Japan || TKO (Referee Stoppage) || 2 ||

|- style="background:#cfc;" | 2018-11-07|| Win ||align=left| Superball Tded99 || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2018-09-27 || Win ||align=left| Saeksan Or. Kwanmuang || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2018-07-25 || Win ||align=left| Saeksan Or. Kwanmuang || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#c5d2ea;" | 2018-06-28 || Draw ||align=left| Saeksan Or. Kwanmuang || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2018-04-28|| Win ||align=left| Phetwason Or.Daokrajai || Phoenix 7 Phuket|| Phuket, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2018-02-26|| Win ||align=left| Superbank Mor Ratanabandit || Phoenix 5 Bangkok || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2018-01-25|| Loss ||align=left| Phetwason Or.Daokrajai || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2017-12-21|| Loss ||align=left| Phet Utong Or. Kwanmuang || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |

|- style="background:#fbb;" | 2017-11-13|| Loss ||align=left| Mongkolkaew Sor.Sommai || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2017-09-11|| Win ||align=left| Superbank Mor Ratanabandit || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#c5d2ea;" | 2017-07-27|| Draw ||align=left| Superbank Mor Ratanabandit || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2017-06-28|| Win ||align=left| Phet Utong Or. Kwanmuang || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2016-11-15|| Loss ||align=left| Panpayak Jitmuangnon || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2016-10-04 || Win ||align=left| Nuenglanlek Jitmuangnon || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2016-07-21|| Win ||align=left| Tuan Kor.Kumpanart || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2016-06-09|| Loss ||align=left| Panpayak Jitmuangnon || Onesongchai Fights, Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2016-03-04|| Loss ||align=left| Panpayak Jitmuangnon || Kriekkrai Fights, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2016-02-12|| Win ||align=left| Jamesak Sakburiram || Lumpinee Stadium || Bangkok, Thailand || TKO || 3 ||

|- style="background:#fbb;" | 2015-12-22|| Loss ||align=left| Panpayak Jitmuangnon || Kiatphet Fights, Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2015-11-10|| Win ||align=left| Saen Parunchai || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2015-08-11 || Win ||align=left| Superlek Kiatmuu9 || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2015-07-02 || Win ||align=left| Phetmorakot Teeded99 || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2015-04-29 || Loss ||align=left| Yuthakan Phet-Por.Tor.Or || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2015-03-07 || Loss ||align=left| Panpayak Sitjatik || Siam Omnoi Boxing Stadium || Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2015-01-24 || Win ||align=left| Kaewkangwan Sitlekphet || Siam Omnoi Boxing Stadium || Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2014-11-08 || Win ||align=left| Denkongkae JSP || Channel 7 Boxing Stadium || Thailand || KO || 2 ||

|- style="background:#fbb;" | 2014-09-20 || Loss ||align=left| Panpayak Sitjatik || Siam Omnoi Boxing Stadium || Thailand || KO || 3 ||

|- style="background:#cfc;" | 2014-07-16 || Win ||align=left| Songkom Srisuriyanyotin || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#c5d2ea;" | 2014-02-07 || Draw ||align=left| Fonluang Sitboonmee || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#fbb;" | 2014-01-07 || Loss ||align=left| Sam-A Gaiyanghadao || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00

|- style="background:#cfc;" | 2013-10-08 || Win ||align=left| Wisanupon Sujeebameekeow || Lumpinee Stadium || Bangkok, Thailand || Decision || 5|| 3:00

|- style="background:#fbb;"