TS
Light flyweight · Thailand
Thanongsak Simsri 42-1-0 37 KO · 2018–2026
Updated Oct 14, 2026 · Sources: Wikidata, English Wikipedia, Wikipedia (ja), +2
Thanongsak Simsri is a light flyweight boxer from Thailand, born Jun 17, 2000. Record 42-1-0 with 37 knockouts over 2018–2026. World titles: IBF light flyweight (2025–present). Thanongsak Simsri last fought Mark Vicelles on Sep 26, 2026 and won by TKO in round 2 of 12.
Also: ทนงศักดิ์ สิมศรี · タノンサック・シムシー · Petchkoson Greentsuda
Born Jun 17, 2000
Country 🇹🇭 Thailand
Stance Orthodox
Reach 164 cm
Nickname The Black Wolf
Debut Jun 20, 2018
Career 2018–2026
Rounds boxed 151
KO share 88%
Born in Sisaket, Thailand
Titles IBF light flyweight · 2025–present
Boxerbook rating #2 in Light flyweight · 1993 ± 127Why here › Confirmed bouts 10 of 43 · 10 official
Record and next fight Record
42-1-0, 37 KOs · 2018–2026
Next fight
No next fight confirmed
Last result W
For IBF light flyweight title TKO 2/12 · Fujisan Messe, Shizuoka, 🇯🇵
The record 43 bouts, 2018–2026, newest first. Records under each bout are both boxers going in.
Bouts by source: English Wikipedia · 42, Wikipedia (ja) · 42, Japan Boxing Commission — 試合報告書 · 10, IBF/USBA Results · 4
W
For IBF light flyweight title TKO 2/12 · Fujisan Messe, Shizuoka, 🇯🇵
Simsri 41-1-0 · Vicelles 21-2-1
W
Sergio Mendoza
Retained IBF light-flyweight title KO 2/12 · Korakuen Hall, Tokyo, 🇯🇵
Simsri 40-1-0 · Mendoza —
W
Won vacant IBF light-flyweight title SD 12/12 · Ota Ward General Gymnasium, Tokyo, 🇯🇵
Simsri 39-1-0 · Araneta 25-2-0
W
Songchai Songklod
KO 3/6 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 38-1-0 · Songklod —
W
Retained OPBF light-flyweight title SD 12/12 · Sumiyoshi Sports Center, Osaka, 🇯🇵
Simsri 37-1-0 · Taniguchi 19-5-0
W
Saravut Rongpig
TKO 2/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 36-1-0 · Rongpig —
W
John Paul Gabunilas
Retained OPBF light-flyweight title TKO 5/12 · EDION Arena, Osaka, 🇯🇵
Simsri 35-1-0 · Gabunilas —
W
Assada Rakmit
KO 2/6 · Spaceplus Bangkok RCA, Bangkok, 🇹🇭
Simsri 34-1-0 · Rakmit —
W
Won OPBF light-flyweight title UD 12/12 · EDION Arena Osaka, Osaka, 🇯🇵
Simsri 33-1-0 · Fajardo 11-1-2
W
Bordin Chomphoo
TKO 1/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 32-1-0 · Chomphoo —
W
Chiraphan Taosuwan
TKO 2/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 31-1-0 · Taosuwan —
W
Shota Asami
KO 2/8 · Hirakata Municipal General Gymnasium, Hirakata, 🇯🇵
Simsri 30-1-0 · Asami —
W
Nawamin Klaypeayoon
TKO 1/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 29-1-0 · Klaypeayoon —
W
Oatsadin Thimthep
TKO 3/6 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 28-1-0 · Thimthep —
W
Weerawat Thongchaichan
TKO 2/6 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 27-1-0 · Thongchaichan —
W
Chiraphan Taosuwan
TKO 5/8 · Singmanassak Muaythai School, Pathum Thanu, 🇹🇭
Simsri 26-1-0 · Taosuwan —
W
Sittipon Sangtean
TKO 3/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 25-1-0 · Sangtean —
L
TKO 7/10 · Yokkaichi City General Hall, Yokkaichi, 🇯🇵
Simsri 25-0-0 · Yabuki 13-5-0
W
Kris Sriphum
TKO 3/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 24-0-0 · Sriphum —
W
Jaturong Yuenyong
TKO 2/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 23-0-0 · Yuenyong —
Show all 43 bouts W
Benjaphon Phokam
Won vacant ABF light-flyweight title TKO 2/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 22-0-0 · Phokam —
W
Kampanart Valsiripattanachai
TKO 4/6 · Sasakul Gym, Pathum Thani, 🇹🇭
Simsri 21-0-0 · Valsiripattanachai —
W
Natthapon Buasa
TKO 2/6 · Singmanassak Muaythai School, Pathuk Thani, 🇹🇭
Simsri 20-0-0 · Buasa —
W
Songkran Sosahwat
TKO 1/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 19-0-0 · Sosahwat —
W
Chanon Sonkham
KO 3/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 18-0-0 · Sonkham —
W
Thaweesak Nakham
Retained Thai light-flyweight title TKO 3/8 · Hamarith Muaythai, Sa Kaeo, 🇹🇭
Simsri 17-0-0 · Nakham —
W
Tongthep Taeyawong
RTD 4/8 · Singmanassak Muaythai School, Pathum Thani, 🇹🇭
Simsri 16-0-0 · Taeyawong —
W
Nutthakorn Sungsevee
TKO 3/6 · Kiatkririn Fitness & Martial Art, Samut Prakan, 🇹🇭
Simsri 15-0-0 · Sungsevee —
W
Suriya Puttaluksa
TKO 4/6 · Kiatkririn Fitness & Martial Art, Samut Prakan, 🇹🇭
Simsri 14-0-0 · Puttaluksa —
W
Christian Bacolod
UD 8/8 · EDION Arena, Osaka, 🇯🇵
Simsri 13-0-0 · Bacolod —
W
Lerdchai Chaiyawed
UD 6/6 · Kiatkririn Fitness & Martial Art, Samut Prakan, 🇹🇭
Simsri 12-0-0 · Chaiyawed —
W
Nattee Thongsingcle
Won vacant Thai light-flyweight title KO 3/8 · Kiatkririn Fitness & Martial Art, Samut Prakan, 🇹🇭
Simsri 11-0-0 · Thongsingcle —
W
Mektison Marganti
KO 3/8 · EDION Arena, Osaka, 🇯🇵
Simsri 10-0-0 · Marganti —
W
Watcharaphon Chaisai
TKO 2/8 · Kiatkririn Fitness & Martial Art, Samut Prakan, 🇹🇭
Simsri 9-0-0 · Chaisai —
W
Panuwat Yakaret
TKO 1/6 · Kiatkririn Fitness & Martial Art, Samut Prakan, 🇹🇭
Simsri 8-0-0 · Yakaret —
W
Ricardo Sueno
TKO 1/6 · EDION Arena, Osaka, 🇯🇵
Simsri 7-0-0 · Sueno —
W
Kermoo
KO 1/8 · Prison & Correctional Facility, Bangkok, 🇹🇭
Simsri 6-0-0 · Kermoo —
W
Phirom Padanprasert
KO 5/6 · Maejo University, Chiang Mai, 🇹🇭
Simsri 5-0-0 · Padanprasert —
W
Manop Audomphanawari
TKO 5/6 · Maetuenwittaya School, Lamphun, 🇹🇭
Simsri 4-0-0 · Audomphanawari —
W
Suriya Puttaluksa
TKO 2/4 · Municipality of Bangbuathong, Nonthaburi, 🇹🇭
Simsri 3-0-0 · Puttaluksa —
W
Prajak Butlee
TKO 2
Simsri 2-0-0 · Butlee —
W
Prajak Butsree
TKO 2/4 · Ratirat Villege, Nonthaburi, 🇹🇭
Simsri 1-0-0 · Butsree —
W
Thanapong Saekoo
TKO 1/4 · Chinese Taipei Association, Samut Prakan, 🇹🇭
Simsri 0-0-0 · Saekoo —
Ratings now
World titles
Facts
What is Thanongsak Simsri's record? Thanongsak Simsri's professional record is 42-1-0 with 37 knockouts.
When is Thanongsak Simsri's next fight? No next fight is confirmed as of 18 Oct 2026.
Who did Thanongsak Simsri fight last? Thanongsak Simsri last fought Mark Vicelles on Sep 26, 2026 and won by TKO in round 2 of 12.
Which world titles has Thanongsak Simsri held? Thanongsak Simsri has held 1 world title reign: IBF light flyweight (2025–present). Sources Boxerbook ID 3735 · permanent link boxerbook.com/id/3735 . Wikidata (CC0), English Wikipedia (CC BY-SA), publisher rankings. Last fetched: 2026-10-12. Spot a mistake? Every bout page has a link to report it.