On March 12, 2021, a 36-year-old Kwanthai Sithmorseng (50-7-1, 27 KOs) and a 34-year-old fellow Thai boxer Srisaket Sor Rungvisai (49-5-1, 42 KOs) met in the ring.
Sithmorseng came in to the fight on a 1-fight win streak with a 46% KO rate, and was fighting after a gap of 2 months and 12 days. Rungvisai was on a 2-fight win streak with a 76% KO rate, and fighting after a layoff of 5 months and 9 days.
Srisaket Sor Rungvisai stopped Kwanthai Sithmorseng via RTD in the 3rd round. Rungvisai improves his record to 50-5-1 (43 KOs), while Sithmorseng adds a loss to his record at 50-8-1.
On June 9, 2019, a 34-year-old Kwanthai Sithmorseng (49-6-1, 26 KOs) and Jayson Mama met in the ring.
Sithmorseng came in to the fight on a 1-fight win streak with a 46% KO rate, and was fighting after a gap of 1 month.
Kwanthai Sithmorseng lost to Jayson Mama via TKO in the 3rd round, and adds a loss to his record at 49-7-1.
On May 5, 2018, a 33-year-old Kwanthai Sithmorseng (48-5-1, 26 KOs) and Wulan Tuolehazi met in the ring.
Sithmorseng came in to the fight on a 1-fight losing streak with a 48% KO rate, and was fighting after a gap of 5 months and 2 days.
Kwanthai Sithmorseng lost to Wulan Tuolehazi via TKO in the 4th round, and adds a loss to his record at 48-6-1.
On December 3, 2017, a 33-year-old Kwanthai Sithmorseng (48-4-1, 26 KOs) and Masahiro Sakamoto met in the ring in a flyweight bout.
Sithmorseng came in to the fight on a 1-fight win streak with a 49% KO rate, and was fighting after a gap of 6 months and 10 days.
Kwanthai Sithmorseng lost to Masahiro Sakamoto via KO in the 3rd round, and adds a loss to his record at 48-5-1.
On May 6, 2015, a 30-year-old Kwanthai Sithmorseng (47-3-1, 25 KOs) got a shot at the light-flyweight WBA title held by 28-year-old Japanese boxer Ryoichi Taguchi (21-2-1, 8 KOs).
Sithmorseng came in to the fight on a 3-fight win streak with a 49% KO rate, and was fighting after a gap of 3 months. Taguchi was on a 3-fight win streak with a 33% KO rate, and fighting after a layoff of 4 months and 6 days.
Ryoichi Taguchi stopped Kwanthai Sithmorseng via TKO in the 8th round of the 12-round world-title fight, and successfully defended his WBA light-flyweight title. Taguchi improves his record to 22-2-1 (9 KOs), while Sithmorseng adds a loss to his record at 47-4-1.
On August 8, 2014, a 29-year-old Kwanthai Sithmorseng (44-2-1, 23 KOs) and Stamp Kiatniwat met in the ring in a flyweight bout.
Sithmorseng came in to the fight on a 3-fight win streak with a 48% KO rate, and was fighting after a gap of 3 months and 7 days.
Kwanthai Sithmorseng lost to Stamp Kiatniwat via unanimous decision in the 12-round flyweight fight, and adds a loss to his record at 44-3-1.
On September 11, 2013, a 28-year-old Kwanthai Sithmorseng (41-1-1, 21 KOs) got a shot at the light-flyweight WBA title held by 24-year-old Japanese boxer Kazuto Ioka (12-0, 8 KOs).
Sithmorseng came in to the fight on a 12-fight win streak with a 48% KO rate, and was fighting after a gap of 2 months and 6 days. Ioka was on a 12-fight win streak with a 66% KO rate, and fighting after a layoff of 4 months and 3 days.
Kazuto Ioka stopped Kwanthai Sithmorseng via KO in the 7th round of the 12-round world-title fight, and successfully defended his WBA (Regular) light-flyweight title. Ioka improves his record to 13-0 (9 KOs), while Sithmorseng adds a loss to his record at 41-2-1.
On April 19, 2011, the 26-year-old WBA strawweight world champion, Kwanthai Sithmorseng (29-0-1, 16 KOs), faced Muhammad Rachman, in a title defense fight.
Sithmorseng came in to the fight on a 29-fight win streak with a 53% KO rate, and was fighting after a gap of 5 months and 14 days.
Kwanthai Sithmorseng was defending his strawweight WBA titles against Muhammad Rachman and lost via KO in the 9th round, and adds a loss to his record at 29-1-1.