Thammanoon Niyomtrong losses
Over 14 years as a professional, Thammanoon Niyomtrong has compiled a 29-2 (11) record, including 29 title fights across two weight classes. He has two losses, all of them in title fights.
2. Thammanoon Niyomtrong loses to Shokichi Iwata via KO
On March 15, 2026 Thammanoon Niyomtrong defended his WBC light flyweight title against Shokichi Iwata. Niyomtrong was 35 years old with a record of 29-1, and Iwata was 0 with a record of 0-0. Niyomtrong was on a 4-fight winning streak. Iwata stopped Niyomtrong via TKO in the 8th round. Lost the title.
1. Thammanoon Niyomtrong loses to Oscar Collazo via KO
On November 16, 2024 Thammanoon Niyomtrong, the WBA (Super) strawweight champion, met Oscar Collazo, the WBO strawweight champion, in a title unification fight. Niyomtrong was 34 years old with a record of 25-0, and Collazo was 27 with a record of 10-0. Niyomtrong was on an undefeated 25-fight winning streak and Collazo was on an undefeated 10-fight winning streak. Collazo stopped Niyomtrong via TKO in the 7th round. Lost the title in unification.