On July 13, 2010, a 25-year-old Kwanthai Sithmorseng (27-0-1, 15 KOs) and Ricky Manufoe met in the ring for the 2nd time, in a strawweight bout.
Sithmorseng came in to the fight on a 27-fight win streak with a 53% KO rate, and was fighting after a gap of 2 months and 16 days.
In the rematch, Kwanthai Sithmorseng stopped Ricky Manufoe via TKO in the 6th round. Sithmorseng improves his record to 28-0-1 (16 KOs)
On November 5, 2010, 26-year-old Kwanthai Sithmorseng (28-0-1, 16 KOs) and Wicha Phulaikhao fought for the vacant WBA strawweight title.
Sithmorseng came in to the fight on a 28-fight win streak with a 55% KO rate, and was fighting after a gap of 3 months and 23 days.
Kwanthai Sithmorseng defeated Wicha Phulaikhao via split decision . Sithmorseng improves his record to 29-0-1
On May 22, 2012, a 27-year-old Kwanthai Sithmorseng (34-1-1, 18 KOs) and Hengky Elleuw met in the ring in a strawweight bout.
Sithmorseng came in to the fight on a 5-fight win streak with a 50% KO rate, and was fighting after a gap of 1 month and 20 days.
Kwanthai Sithmorseng stopped Hengky Elleuw via TKO in the 2nd round. Sithmorseng improves his record to 35-1-1 (19 KOs)
On April 29, 2008, a 23-year-old Kwanthai Sithmorseng (17-0-1, 9 KOs) and Zhang Yuan Boau met in the ring in a strawweight bout.
Sithmorseng came in to the fight on a 17-fight win streak with a 50% KO rate, and was fighting after a gap of 2 months and 10 days.
Kwanthai Sithmorseng stopped Zhang Yuan Boau via TKO in the 1st round. Sithmorseng improves his record to 18-0-1 (10 KOs)
On November 1, 2007, a 23-year-old Kwanthai Sithmorseng (14-0-1, 8 KOs) and Adisak Polkratok met in the ring for the 2nd time, in a strawweight bout.
Sithmorseng came in to the fight on a 14-fight win streak with a 53% KO rate, and was fighting after a gap of 3 months and 14 days.
In the rematch, Kwanthai Sithmorseng stopped Adisak Polkratok via KO in the 2nd round. Sithmorseng improves his record to 15-0-1 (9 KOs)
On February 4, 2009, a 24-year-old Kwanthai Sithmorseng (19-0-1, 10 KOs) and Agus Situmorang met in the ring in a strawweight bout.
Sithmorseng came in to the fight on a 19-fight win streak with a 50% KO rate, and was fighting after a gap of 5 months and 6 days.
Kwanthai Sithmorseng stopped Agus Situmorang via KO in the 3rd round. Sithmorseng improves his record to 20-0-1 (11 KOs)
On July 5, 2013, a 28-year-old Kwanthai Sithmorseng (40-1-1, 20 KOs) and Madit Sada met in the ring in a strawweight bout.
Sithmorseng came in to the fight on a 11-fight win streak with a 47% KO rate, and was fighting after a gap of 1 month and 7 days.
Kwanthai Sithmorseng stopped Madit Sada via TKO in the 5th round. Sithmorseng improves his record to 41-1-1 (21 KOs)
On April 2, 2012, a 27-year-old Kwanthai Sithmorseng (33-1-1, 17 KOs) and Domi Nenokeba met in the ring in a strawweight bout.
Sithmorseng came in to the fight on a 4-fight win streak with a 48% KO rate, and was fighting after a gap of 1 month and 5 days.
Kwanthai Sithmorseng stopped Domi Nenokeba via TKO in the 5th round. Sithmorseng improves his record to 34-1-1 (18 KOs)
On December 30, 2020, a 36-year-old Kwanthai Sithmorseng (49-7-1, 26 KOs) and Rattakorn Tassaworn met in the ring in a super-flyweight bout.
Sithmorseng came in to the fight on a 1-fight losing streak with a 45% KO rate, and was fighting after a gap of 1 year, 6 months, and 21 days.
Kwanthai Sithmorseng stopped Rattakorn Tassaworn via RTD in the 3rd round. Sithmorseng improves his record to 50-7-1 (27 KOs)
On April 30, 2009, a 24-year-old Kwanthai Sithmorseng (20-0-1, 11 KOs) and Little Roseman met in the ring in a strawweight bout.
Sithmorseng came in to the fight on a 20-fight win streak with a 52% KO rate, and was fighting after a gap of 2 months and 26 days.
Kwanthai Sithmorseng stopped Little Roseman via KO in the 4th round. Sithmorseng improves his record to 21-0-1 (12 KOs)