Somkid Kruewan (; born August 29, 1970), known professionally as Therdkiat Sitthepitak (), is a Thai former professional Muay Thai fighter. He is a former four-time Lumpinee Stadium champion across two divisions who was famous in the 1980s and 1990s. He was known to be an "aggressive Muay Femur".
Kruewan was born in the Satuek district in Buriram province on August 29, 1970. His father, a former Muay Thai fighter, initiated him and all 3 of his brothers to Muay Thai. Under the ring name Kiatnarong Luksakaew, he had his first Muay Thai fight at 14-years-old where he won by a 2nd round knockout. Once he became a well-known fighter in Surin province, he changed his ring name to Therdkiat Sitphonphitak and started taking matchups in Buriram province for several years. Therdkiat lost for the first time after facing Kaewsawan Sitsathasan, by that point he had a record of around 25 fights with no losses. In mid 1986, he was scouted by Songchai Rattanasuban, the owner of the Onesongchai promotion. Around this time, Therdkiat was training Muay Thai by himself since he could not find training partners in his hometown, so Rattanasuban would send him Bangkok so that he could briefly train at various Muay Thai gyms before fights. Rattanasuban then gave him the ring name of Therdkiat Sitthepitak.
Rattanasuban set him up to begin fighting in Lumpinee Stadium from mid 1986 and onward. He won his first 3 Lumpinee fights. In 1987, he won the junior flyweight championship awarded by the Northeastern Professional Boxing Council of Thailand after beating "The Elbow Hunter of 100 Stitches" Yodkhunpon Sittraiphum in Roi Et province. At this time, his two older brothers, Wuttichai and Noomchingchai, as well as his father, Plian Kruewan, were his trainers at home. 1989 was a significant year in Therdkiat's career as he would beat Samransak Muangsurin, Superlek Sorn E-Sarn, Kawnar Sor.Khetallingchan, among other yodmuay (elite fighters). Therdkiat won the Lumpinee Junior Featherweight title that year and later the Lumpinee Featherweight title in 1990.
After losing to Jongsanan Fairtex in August 1992, the Onesongchai promotion had Therdkiat be recruited by the Nongkeepahuyuth gym in Bangkok due to his inconsistent performances since 1990. There, Therdkiat began training under Pramot Hoymook and became teammates with former opponents Namphon and Namkabuan Nongkeepahuyuth. Afterwards, Therdkiat held a 5-win streak against 4 fighters who resided at the top of the featherweight division in October 1992 to March 1993, during which he knocked out Jongsanan with a head kick. In his first match against Oley Kiatoneway, Therdkiat was knocked down 3 times by punches in the first round, resulting in a TKO loss. They rematched 2 months later for the Lumpinee featherweight title where he was able to outscore Oley and win the belt for the 3rd time.
He would be nicknamed "The King of Lumpinee," "The King of Kathina," and "The Disc Brake Kicker," the last alias being a reference to his ability to make opponents stop in place with his teep kicks. He was also named Jom Krathin ("The Acacia") since he preferred to eat Acacia leaves after training sessions in his hometown. In his first few Bangkok fights, Therdkiat would become exhausted in the later rounds, so a journalist joked that it was because he only ate Acacia leaves. He was noted for being an aggressive Muay Femur stylist (rope-a-dope fighter in Muay Thai) similar to his teammate Namkabuan. Therdkiat was noted to have unusually aggressive counters for a Muay Femur fighter.
After losing the Lumpinee Featherweight title to Mathee Jadeepitak in 1994, Therdkiat began performing worse in the following years of his career. Despite this, he was still able to win against Orono Por.Muangubon, Pairot Wor.Walapon (KO), Rainbow Sor.Prantalay, Samkor Kiatmontep, etc. He fought infrequently until he retired in 2003. In the final years of his Muay Thai career, he went by the ring name of Therdkiat Kiatrungroj. He stayed with the Nongkeepahuyuth gym until the end of his fighting career. His Muay Thai record consists of 107 wins, 30 losses and 3 draws.
His family consists of his wife Jintana Kruewan, their son, and their daughter Nongcheer. Nongcheer is also a Muay Thai fighter who has had around 20 fights as of August 2022. She also competed in a boxing match held by the Team Ellis promotion in Australia. She goes by the ring name of Nongcheer Sitthepitak.
|- style="background:#fbb;" | || Loss ||align=left| Brad Wright || || Perth, Australia || KO (Knee to the body) || ||
|- style="background:#cfc;" | 2003-12-05 || Win ||align=left| Alex Ricci || King's Birthday Event || Sanam Luang, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 2001-09-29 || Win ||align=left| Kanongsaklek K.T.Gym || || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 2000-09-09 || Loss ||align=left| Attachai Por.Samranchai || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1999-03-26 || Loss ||align=left| Attachai Por.Yosanan || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#fbb;" | 1999-02-10 || Loss ||align=left| Kaolan Kaovichit || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1999-01-02 || Loss ||align=left| Orono Por Muang Ubon || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 199?-09-30 || Loss ||align=left| Khunsuk Sunwelarewadee || || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1997-10-05 || Loss ||align=left| Morad Sari || || Paris, France || TKO (Punches) || 3 ||
|- style="background:#cfc;" | 1997-06-01 || Win ||align=left| Kaoponglek Luksuratham || Paet Riew International Stadium || Chachoengsao, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 1996- || Win ||align=left| Orono Por.MuangUbon || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1996-07-20 || Win ||align=left| Pairot Wor.Walapon || || Buriram, Thailand || KO (Right Cross) || 3 ||
|- style="background:#fbb;" | 1996-05-21 || Loss ||align=left| Kaoponglek Luksuratham || Lumpinee Stadium || Bangkok, Thailand || KO (Elbow) || 4 ||
|- style="background:#cfc;" | 1996-03-05 || Win ||align=left| Samkor Kiatmontep || Lumpinee Stadium || Bangkok, Thailand || Decision || 5||3:00
|- style="background:#cfc;" | 1996-01-19 || Win ||align=left| Rainbow Sor.Prantalay || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 ||3:00
|- style="background:#fbb;" | 1995- || Loss ||align=left| Chatchai Paiseetong || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#c5d2ea;" | 1995-02-28 || NC ||align=left| Pairot Wor.Wolapon || Onesongchai, Lumpinee Stadium || Bangkok, Thailand || Ref.stop. (Therdkiat dismissed) || 4 ||
|- style="background:#cfc;" | 1995-01-31 || Win ||align=left| Orono Por.MuangUbon || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#c5d2ea;" | 1994-11-29 || Draw ||align=left| Chatchai Paiseetong || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1994-07-29 || Loss ||align=left| Mathee Jadeepitak || Lumpinee Stadium || Bangkok, Thailand || TKO (Doctor Stoppage) || 4 || |- ! style=background:white colspan=9 |
|- style="background:#fbb;" | 1994-06-20 || Loss ||align=left| Chatchai Paiseetong || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1994-04-02|| Win ||align=left| Jongsanan Fairtex || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 ||3:00
|- style="background:#cfc;" | 1994-01-24|| Win||align=left| Jongsanan Fairtex || Rajadamnern Stadium || Bangkok, Thailand || Decision|| 5 ||3:00
|- style="background:#cfc;" | 1993-11-29 || Win ||align=left| Robert Kaennorasing || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1993-10-05 || Win ||align=left| Oley Kiatoneway || Lumpinee Stadium || Bangkok, Thailand || Decision (Majority) || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#fbb;" | 1993-08-06 || Loss ||align=left| Oley Kiatoneway || Lumpinee Stadium || Bangkok, Thailand || TKO (3 knockdowns) || 1 ||
|- style="background:#fbb;" | 1993-07-11 || Loss ||align=left| Jongsanan Fairtex || || Nakhon Sawan, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1993-03-23 || Win ||align=left| Chandet Sor.Prantalay || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 ||3:00
|- style="background:#cfc;" | 1993-02-26 || Win ||align=left| Robert Kaennorasing || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1993-01-29|| Win ||align=left| Jongsanan Fairtex || Lumpinee Stadium || Bangkok, Thailand || KO (Right high kick)|| 2 ||
|- style="background:#cfc;" | 1992-11-20 || Win ||align=left| Nuathoranee Thongracha || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1992-10-13 || Win ||align=left| Cherry Sor.Wanich || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1992-08-|| Loss ||align=left| Jongsanan Fairtex || || Australia || Decision || 5 || 3:00
|- style="background:#fbb;" | 1992-06-09 || Loss ||align=left| Namkabuan Nongkeepahuyuth || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1992-03-20 || Win ||align=left| Sangtiennoi Sor.Rungroj || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1992-02-21 || Loss ||align=left| Jongsanan Fairtex || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 1991-09-27 || Win ||align=left| Sanit Wichitkriengkrai || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 1991-07-20 || Win ||align=left| Jack Kiatniwat || Crocodile Farm || Samut Prakan, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1991-06-14 || Loss ||align=left| Jaroenthong Kiatbanchong || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#fbb;" | 1991-03-01 || Loss ||align=left| Namphon Nongkeepahuyuth || Lumpinee Stadium || Bangkok, Thailand || KO || 4 ||
|- style="background:#cfc;" | 1991-02-15 || Win ||align=left| Rajasak Sor.Vorapin || || Phra Nakhon Si Ayutthaya, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1990-12-20 || Loss ||align=left| Rajasak Sor.Vorapin || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1990-11-27 || Win ||align=left| Jaroenthong Kiatbanchong || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1990-10-30 || Loss ||align=left| Cherry Sor.Wanich || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1990-09-28 || Win ||align=left| Panomrunglek Chor.Sawat || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1990-08-31 || Loss ||align=left| Cherry Sor.Wanich || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 1990-06-30 || Win ||align=left| Petchdam Lukborai || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#c5d2ea;" | 1990-06-08 || Draw ||align=left| Grandprixnoi Muangchaiyaphum || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1990-04-24 || Loss ||align=left| Jaroenthong Kiatbanchong || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1990-03-30 || Win ||align=left| Panomrunglek Chor.Sawat || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 1990-03- || Win ||align=left| Boonlong Sor.Thanikul || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1990-02-06 || Win ||align=left| Boonlong Sor.Thanikul || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1990-01- || Win ||align=left| Rot Lukrangsee || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1989-11-28 || Loss ||align=left| Panomrunglek Chor.Sawat || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1989-11-07 || Win ||align=left| Superlek Sorn E-Sarn || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 1989-10-06 || Win ||align=left| Pon Narupai || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1989- || Win ||align=left| Kaonar Sor.Ketallingchan || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1989-07-29 || Win ||align=left| Samransak Muangsurin || Sri Narong Stadium || Surin, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1989-06-24 || Loss ||align=left| Samransak Muangsurin || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1989-04- || Win ||align=left| Den Muangsurin || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1989-03-06 || Win ||align=left| Thammawit Saksamut || Rajadamnern Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1989-02- || Win ||align=left| Khunpon Chor.Rojanachai || Lumpinee Stadium || Bangkok, Thailand || KO || 2 ||
|- style="background:#cfc;" | 1989-01-31 || Win ||align=left| Panomrunglek Chor.Sawat || Lumpinee Stadium || Bangkok, Thailand || Referee Stoppage || 4 ||
|- style="background:#fbb;" | 1989-01-06 || Loss ||align=left| Den Muangsurin || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1988-12-10 || Win ||align=left| Nongmoon Chomphutong || || Udon Thani, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1988-11-25 || Win ||align=left| Ritthichai Lookchaomaesaitong || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1988-11-04 || Loss ||align=left| Panomrunglek Chor.Sawat || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1988-09-18 || Win ||align=left| Kingdaeng Sor.Rattana || || Khon Kaen, Thailand || KO || 3 ||
|- style="background:#cfc;" | 1988-07-16 || Win ||align=left| Dawuthai Chatchuphon || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1988- || Win ||align=left| Kaenphet Saksam || || Thailand || KO || 3 ||
|- style="background:#cfc;" | 1988- || Win ||align=left| Samingkhao Sor.Rattana || || Thailand || KO || 2 ||
|- style="background:#cfc;" | 1988- || Win ||align=left| Kongnapa Kiatmongkol || || Thailand || KO || 2 ||
|- style="background:#cfc;" | 1987- || Win ||align=left| Sinchai || || Roi Et, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1987-06-30 || Win ||align=left| Yodkhunpon Sittraiphum || || Roi Et, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 1987-05-29 || Win ||align=left| Mingmuang Lukjaophomehasak || || Roi Et, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1986-12-13 || Win ||align=left| Chakkrathep Luknoendindaeng || Rajadamnern Stadium || Bangkok, Thailand || KO || ||
|- style="background:#cfc;" | 1986-10-16 || Win ||align=left| Pichitchailek Sitpichitchai || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | 1986-09-20 || Loss ||align=left| Pichitchailek Sitpichitchai || || Ubon Ratchathani, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1986-09-16 || Win ||align=left| Rungrat Srisanchai || Lumpinee Stadium || Bangkok, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1986-09-03 || Win ||align=left| Sangdaonoi Suraphom || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1986-08-12 || Win ||align=left| Keawsawan Sitsathasan || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | 1986-08-01 || Win ||align=left| Khirisak Ekamit || Lumpinee Stadium || Bangkok, Thailand || KO || 3 ||
|- style="background:#cfc;" | || Win ||align=left| Yodphet Amornrit || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | || Win ||align=left| Damrongdet Lukbangbon || || Buriram, Thailand || KO || 4 ||
|- style="background:#cfc;" | || Win ||align=left| Chingchai Lukathit || || Buriram, Thailand || KO || 3 ||
|- style="background:#cfc;" | || Win ||align=left| Supernoi Kiatphattana || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | || Win ||align=left| Kaikeaw Sor.Saengthorn || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | || Win ||align=left| Mangkornnoi Kiatkitti || || Buriram, Thailand || KO || 3 ||
|- style="background:#cfc;" | || Win ||align=left| Damrongdet Lukbangbon || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#fbb;" | || Loss ||align=left| Keawsawan Sitsathasan || || Buriram, Thailand || Decision || 5 || 3:00 |- ! style=background:white colspan=9 |
|- style="background:#c5d2ea;" | || Draw ||align=left| Sornthep Or.Sribualoi || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | || Win ||align=left| Deesam Kiatthanasarn || || Buriram, Thailand || KO || 4 ||
|- style="background:#cfc;" | || Win ||align=left| Deesam Kiatthanasarn || || Buriram, Thailand || KO || 4 ||
|- style="background:#cfc;" | || Win ||align=left| Taemdaonoi Sitchaiyot || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | || Win ||align=left| Omsap Saklamchi || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | || Win ||align=left| Dechanokkarian Sor.Salangthon || || Buriram, Thailand || Decision || 5 || 3:00
|- style="background:#cfc;" | || Win ||align=left| Dongbanglek Singhiran || || Buriram, Thailand || KO || 2 ||
|- style="background:#cfc;" | || Win ||align=left| Bowie Or.Yuttanakorn || || Buriram, Thailand || KO || 2 ||
|- style="background:#cfc;" | || Win ||align=left| Rabilnoi Sunkilaputtha || || Buriram, Thailand || KO || 3 ||
|- style="background:#cfc;" | || Win ||align=left| Pathomchai Kiattisiri || || Buriram, Thailand || KO || 2 ||
|- style="background:#cfc;" | || Win ||align=left| Noknoi Ekayothin || || Buriram, Thailand || KO || 2 ||
|- style="background:#cfc;" | || Win ||align=left| Klaidan Kiatsakthewan || || Buriram, Thailand || Decision || 5 || 3:00
|- | colspan=9 | Legend: