Sirimongkol Singmanasak


Sirimongkol Singmanasak is a Thai professional boxer, bare-knuckle boxer and kickboxer. He is a world champion in two weight classes, having held the World Boxing Council bantamweight title in 1997, and the WBC super-featherweight title from 2002 to 2003. His other names were Sirimongkol Nakhon Thong Park View, Sirimongkol Singwancha, Sirimongkol Nakornloung, and Sirimongkhon Iamthuam.

Biography and boxing career

Sirimongkol was born into a family closely connected to Muay Thai, with his father owning the "Singmanasak Boxing Gym" and his brother fighting under the name "Manopchai Singmanasak". His early interests in the Thai folk theatre form Likay were curtailed by his father, who encouraged him to pursue boxing instead.

WBC world champion

Starting as an amateur in high school, Sirimongkol quickly ascended in professional boxing. He claimed the WBU Super flyweight and Bantamweight titles in 1995 and became the WBC Bantamweight Champion in August 1996 at just 19 years old, defeating interim champion José Luis Bueno in Phitsanulok, Thailand. His title shot was earned through a victory over veteran Thai boxer Thanomsak Sithbaobay.
Sirimongkol successfully defended his WBC bantamweight title three times. However, his reign ended in November 1997 when he lost to former Japanese world champion Joichiro Tatsuyoshi in Osaka, Japan. He rebounded strongly, capturing the WBC Super featherweight title in 2002 with a knockout win over Kengo Nagashima, but lost the title a year later to Jesús Chávez.

Post-world title reign

In May 2007, Sirimongkol won the Asian Boxing Council super featherweight title. He then won the PABA light welterweight title in December 2007 before defending the title once in May 2008.

Arrest and later career

In 2009, Sirimongkol's career took a turn following his arrest for possession of Ya ba. During his incarceration, he taught boxing to fellow inmates and continued to compete, winning the WBC Asia Continental Welterweight title. He successfully defended the WBC Asia Continental belt five times from 2012 to 2014. He was pardoned four years into a 20-year sentence.
In October 2014, Sirimongkol defeated Dan Nazareno Jr. to win the WBO Asia Pacific junior middleweight title. He defended the WBO Asia Pacific belt twice in April 2015 and September 2015.
His 51-fight winning streak was finally broken in 2017 by Uzbek boxer Azizbek Abdugofurov in an unsuccessful bid for the WBC Asia middleweight title, marking his first defeat in 14 years.
After winning the UBO Inter-Continental light middleweight title in May 2017 and the Thai light heavyweight title September 2018, Sirimongkol announced his first retirement from boxing on September 20, 2018. He came out of retirement for two more fights, including unsuccessfully challenging Teerachai Sithmorseng for the WBA Asia light heavyweight title in April 2021, before retiring once again.

Bare-knuckle boxing

Sirimongkol made his bare-knuckle boxing debut at BKFC Thailand 1: The Game Changer on December 18, 2021, fighting under his real name of "Sirimongkol Iamthuam". His opponent was Iranian Brazilian jiu-jitsu and full contact karate practitioner Reza Goodary. Despite standing 168 cm and Goodary standing 195 cm, Sirimongkol controlled the majority of the fight and scored a knockdown to win via split decision.

BKFC Thailand Champion

Sirimongkol faced Mike Vetrila for the inaugural BKFC Thailand Light Heavyweight Championship at BKFC Thailand 2: Iconic Impact on May 7, 2022. He won the close fight via majority decision to become the first BKFC Thailand Light Heavyweight Champion.

Entertainment career

Sirimongkol, known for his striking appearance, was dubbed "Teppabud na yok" by his Thai boxing fans. After losing the WBC world title in 1997, he transitioned into show business. His ventures included modeling for a women's fashion magazine, appearing on the 2003 Thai TV drama "Pret Wat Suthat" on Channel 7 and the 2008 martial arts film "Chocolate", and featuring in a music video by the rock band Motive alongside Dom Hetrakul.
In 2005, Sirimongkol faced a scandal involving nude photos. Police discovered gay pornographic magazines featuring his photos being sold at Or Tor Kor Market. This incident was covered by various media outlets.

Professional boxing record

No.ResultRecordOpponentTypeRound, timeDateLocationNotes
109Loss101–8Nick MidgeyTKO2, 1:0418 Oct 2025Singamanassak Muaythai School, Pathum Thani, ThailandFor vacant WBF cruiserweight title
108Win101–7Nitthikorn RitthikraiTKO1, 2:1429 Sep 2025Singamanassak Muaythai School, Pathum Thani, Thailand
107Loss100–7Nick MidgeyTKO3, 1:0723 Aug 2025Fitzys, Logan City, AustraliaFor vacant WBF International heavyweight title
106Win100–6Thoedsak SinamTKO1, 1:1827 Jul 2025Singamanassak Muaythai School, Pathum Thani, Thailand
105Loss99–6Matt FloydUD1227 Dec 2024Marriott Hotel Ankara, Ankara, TurkeyFor vacant UBO cruiserweight title
104Win99–5Matt FloydSD126 Oct 2024Lumpinee Boxing Stadium, Bangkok, ThailandWon vacant WBF (Foundation) light-heavyweight title
103Win98–5Yuttana WongdaUD617 Mar 2024Singmanassak Muaythai School, Pathum Thani, Thailand
102Loss97–5Teerachai SithmorsengRTD6 24 Apr 2021Suanlum Night Bazaar, Bangkok, ThailandFor WBA Asia light-heavyweight title
101Win97–4Thikhamporn ParnkerdTKO1 1 Dec 2019Muaythai School, Pathum Thani, Thailand
100Win96–4Muhammad NsubugaKO2 1 Sep 2018Muaythai School, Pathum Thani, ThailandWon vacant Thai light-heavyweight title
99Loss95–4Tommy BrowneUD1020 Oct 2017Suntec Int. Convention Centre, SingaporeFor vacant IBO Asia Pacific light-middleweight title
98Win95–3Larry SiwuSD1027 May 2017Resorts World Sentosa, SingaporeWon vacant UBO Inter Continental light-middleweight title
97Loss94–3Azizbek AbdugofurovUD1210 Feb 2017Far East Square, SingaporeFor ABCO middleweight title
96Win94–2Carlos RobertoUD1229 Sep 2016SP Kansard Company, Bangkok, Thailand
95Win93–2Chaokeng Laos PDRTKO3 23 Jun 2016Satrimahapuektharam School, Bangkok, Thailand
94Win92–2Zhao Shu SongUD628 Apr 2016Morseng Center, Udon Thani, Thailand
93Win91–2Willy WhippleTKO8 26 Jan 2016Wat Itisukto, Hua Hin, Thailand
92Win90–2Felipe NascimentoUD612 Nov 2015RMUTT, Pathum Thani, Thailand
91Win89–2Saidi MundiKO3 15 Sep 2015Floating Market, Sai NoiRetained WBO Asia Pacific light-middleweight title
90Win88–2Mohamed LarabiUD618 Aug 2015Pathum Thani, Thailand
89Win87–2Dan Nazareno Jr.UD127 Apr 2015Mahachai Villa Market, Samut SakhonRetained WBO Asia Pacific light-middleweight title
88Win86–2Jacob MartinezKO3 28 Jan 2015Wat Itisukto, Hua Hin, Thailand
87Win85–2Alexey AkimenkoRTD2 28 Dec 2014Wongwianyai, Bangkok, Thailand
86Win84–2Dan Nazareno Jr.UD1215 Oct 2014Bueng Phraya Floating Market, Bangkok, ThailandWon vacant WBO Asia Pacific light-middleweight title
85Win83–2Omari RamadanKO3 29 Jul 2014Prachathipat school, Pathum Thani, ThailandRetained ABCO Continental welterweight title
84Win82–2Victor NunezKO4 17 Jun 2014Mahachai Stadium, Samut Sakhon, Thailand
83Win81–2Barak SithyodthongKO2 9 Apr 2014Wat Sakaew School, Ang Thong, Thailand
82Win80–2Xingxin YangRTD6 5 Feb 2014City Hall, Haikou, ChinaRetained ABCO Continental welterweight title
81Win79–2Felipe NascimentoKO2 28 Dec 2013Wongwianyai, Bangkok, Thailand
80Win78–2Jovany RotaKO1 12 Dec 2013Mahachai Villa Arena, Samut Sakhon, ThailandRetained ABCO Continental welterweight title
79Win77–2Ronnel EsparasKO3 17 Sep 201313 Coins Resort, Phraram 9, Bangkok, ThailandRetained ABCO Continental welterweight title
78Win76–2Nicolas LamecheKO3 13 Aug 201313 Coins Resort, Phraram 9, Bangkok, Thailand
77Win75–2Ekeni KritovTKO3 9 Jul 201313 Coins Resort, Phraram 9, Bangkok, Thailand
76Win74–2Mohamadreza HamzeTKO6 14 May 2013Rangsit Stadium, Rangsit, ThailandRetained ABCO Continental welterweight title
75Win73–2Mohammad FaisolTKO3 21 Apr 2013Klongphai, Nakhon Ratchasima, Thailand
74Win72–2Mohammad FaisolKO3 1 Mar 2013Terdthai Market, Ladkrabang, Bangkok, Thailand
73Win71–2Muhammad NsubugaKO6 6 Jan 2013Klongphai, Nakhon Ratchasima, Thailand
72Win70–2Dennis PaduaKO5 14 Nov 2012Wanglee Ground, Pathum Thani, ThailandWon vacant ABCO Continental welterweight title
71Win69–2Peter PikinikPTS618 Sep 2012KMUTT, Bangkok, Thailand
70Win68–2EagleTKO3 30 Jul 2012Central Correctional Instituti, Pathum Thani, Thailand
69Win67–2Umar SsemataKO6 28 Apr 2012Old City Hall, Ayutthaya, Thailand
68Win66–2Mohamadreza HamzeUD123 Dec 2011Doem Bang Nang Buat, Thailand
67Win65–2Peter PikinikTKO2 22 Aug 2011Central Correctional Instituti, Pathum Thani, Thailand
66Win64–2Mohammed SalehKO3 29 Apr 2011Nongsuor School, Pathum Thani, Thailand
65Win63–2Mohammed SalehKO2 12 Aug 2009Nakhon Ratchisima Zoo, Nakhon Ratchasima, Thailand
64Win62–2Michael NigroKO1 1 Aug 2009Muaythai School, Pathum Thani, Thailand
63Win61–2Mohammed SalehKO2 5 Jun 2009Ringping Riverside, Kamphaeng Phet, Thailand
62Win60–2Rogelio Castañeda Jr.MD822 Nov 2008MGM Grand Garden Arena, Paradise, Nevada, U.S.
61Win59–2Chad BennettTKO1 24 May 2008Honeysuckle Boiler Room, Newcastle, AustraliaRetained PABA light-welterweight title
60Win58–2Arnel PorrasUD1221 Dec 2007Sukhothai Thammathirat University, Pak Kret, ThailandWon vacant PABA light-welterweight title
59Win57–2Kaennakorn BangbuathongTKO4 14 Sep 2007Potawattana Saenee School, Ratchaburi, Thailand
58Win56–2Anukun KulamunUD121 May 2007Nonthaburi, ThailandWon ABCO super-featherweight title
57Win55–2Jesus Kibunde KakongeUD621 Mar 2007Amornsap Yuwittaya, Nongjork, Bangkok, Thailand
56Win54–2Lito GonzagaKO3 18 Jul 2006The Mall Bangkapi, Bangkok, Thailand
55Win53–2Hayato TakabayashiUD610 Mar 2006Rachabhak University, Petchaburi, Thailand
54Win52–2Chao LiangTKO4 21 Dec 2005Bangkhuntien, Bangkok, Thailand
53Win51–2Wuxiao SongKO7 7 Nov 2005Central Correctional Instituti, Pathum Thani, Thailand
52Win50–2Arnel TinampayUD828 Sep 2005The Mall Shopping Center, Bangkok, Thailand
51Win49–2Rodney Jun AlbaTKO4 5 Jul 2005Impact Arena, Muang Thong Thani, Thailand
50Win48–2Michael ClarkTKO7 14 May 2005MGM Grand Garden Arena, Paradise, Nevada, U.S.
49Win47–2Donny SuratinUD64 Feb 2005STOU, Pak Kret, Thailand
48Win46–2Fernando MontillaUD89 Sep 2004Chumphon, Thailand
47Win45–2Larry PeloniaTKO8 15 Jul 2004Khon Kaen, Thailand
46Win44–2Wuli MthembuKO1 21 May 2004Nonthai District, Nakhon Ratchasima, Thailand
45Loss43–2Jesús ChávezUD1215 Aug 2003Convention Center, Austin, Texas, U.S.Lost WBC super-featherweight title
44Win43–1Anthony TshehlaTKO6 1 May 2003The Mall Bangkae, Bangkok, Thailand
43Win42–1Choi Yong-sooUD1213 Jan 2003Korakuen Hall, TokyoRetained WBC super-featherweight title
42Win41–1Richard CabilloTKO2 25 Oct 2002The Mall Shopping Center, Nonthaburi, Thailand
41Win40–1Kengo NagashimaKO2 24 Aug 2002Ryōgoku Kokugikan, Yokoami, JapanWon vacant WBC super-featherweight title
40Win39–1Christopher SaludayKO6 1 May 2002Nonthaburi, Thailand
39Win38–1Isagani PumarKO3 30 Mar 2002Nonthaburi, Thailand
38Win37–1Rex MarzanKO3 11 Jan 2002Thanyaburi, Thailand
37Win36–1Arman MolinaTKO4 19 Oct 2001Bangkok, Thailand
36Win35–1Jerry DeGarciaKO8 1 Sep 2001Bangkok, Thailand
35Win34–1Gabby MontanoKO4 12 Jul 2001Bangkok, Thailand
34Win33–1Nori FapuroKO3 4 May 2001Nonthaburi, Thailand
33Win32–1Teofilo TunacaoTKO2 5 Dec 2000Royal Promenade-Sanam Luang, Bangkok, Thailand
32Win31–1Dondon ColasTKO1 18 Oct 2000Bangkok, Thailand
31Win30–1Jonathan MercadoTKO7 25 Jun 2000Bangkok, Thailand
30Win29–1Francis VelasquezTKO5 19 Apr 2000Bangkok, Thailand
29Win28–1Ali AlbaracinKO2 11 Mar 2000Municipal Stadium, Aranyaprathet, Thailand
28Win27–1Al Jongjong AbaoTKO3 19 Jan 2000Bangkok, Thailand
27Win26–1Jerry DeGarciaPTS1017 Nov 1999Bangkok, Thailand
26Win25–1Francis VelasquezTKO9 15 Sep 1999Bangkok, Thailand
25Win24–1Nonoy GonzalesUD1021 Jul 1999Bangkok, Thailand
24Win23–1Jerry DeGarciaPTS821 May 1999National Stadium, Sara Buri, Thailand
23Win22–1Ramon MolinaKO5 17 Mar 1999Bangkok, Thailand
22Win21–1Jun BalabatUD1020 Jan 1999Bangkok, Thailand
21Win20–1Sukhbayar NemekbayarPTS1018 Nov 1998Bangkok, Thailand
20Win19–1Ric RamirezPTS1016 Sep 1998Bangkok, Thailand
19Win18–1Sukhbayar NemekbayarPTS1017 Jun 1998Bangkok, Thailand
18Win17–1Edwin CasanoKO1 13 May 1998Bangkok, Thailand
17Loss16–1Joichiro TatsuyoshiTKO7 22 Nov 1997Osaka-jō Hall, Osaka, JapanLost WBC bantamweight title
16Win16–0Victor RabanalesUD124 Jul 1997Pattani, ThailandRetained WBC bantamweight title
15Win15–0Javier CampanarioKO4 26 Apr 1997Patong Beach Soccer Grounds, Patong, ThailandRetained WBC bantamweight title
14Win14–0Jesus SarabiaUD1215 Feb 1997Nakornpanom Stadium, Nakhon Phanom, ThailandRetained WBC bantamweight title
13Win13–0José Luis BuenoTKO5 10 Aug 1996Soccer Stadium, Phitsanulok, ThailandWon WBC interim bantamweight title
12Win12–0Thanomsak SithbaobayTKO3 5 May 1996Bangkok, Thailand
11Win11–0Arturo EstradaUD1223 Mar 1996Ban Phai Shopping Centre, Ban Phai, ThailandRetained WBU bantamweight title
10Win10–0Miguel EspinozaUD1223 Dec 1995Channel 7 Studios, Bangkok, ThailandWon vacant WBU bantamweight title
9Win9–0Juanito Boy CumaUD125 Aug 1995Channel 7 Studios, Bangkok, ThailandWon vacant WBU super-flyweight title
8Win8–0Alberto CampaninaPTS1021 Jun 1995Bangkok, Thailand
7Win7–0Ledion CenizaPTS1019 Apr 1995Bangkok, Thailand
6Win6–0Ricky FlorKO6 15 Feb 1995Channel 7 Studios, Bangkok, Thailand
5Win5–0Jun LansaderasTKO5 21 Dec 1994Channel 7 Studios, Bangkok, Thailand
4Win4–0Alberto CampaninaPTS1012 Oct 1994Channel 7 Studios, Bangkok, Thailand
3Win3–0Emil RomanoTKO5 17 Aug 1994Channel 7 Studios, Bangkok, Thailand
2Win2–0Joel NicePTS1015 Jun 1994Channel 7 Studios, Bangkok, Thailand
1Win1–0Ritichai KiatprapasPTS618 May 1994Channel 7 Studios, Bangkok, Thailand