Saensak Muangsurin

Saensak Muangsurin
Saensak in 1976
BornBoonsong Mansri
August 13, 1950
Tambon Ban Sadiang, Mueang Phetchabun, Phetchabun, Thailand
DiedApril 16, 2009 (aged 58)
Rajvithi Hospital, Bangkok,Thailand
Native nameบุญส่ง มั่นศรี
NicknameWorld Collapsing Southpaw (ซ้ายทลายโลก)
Pink Southpaw (ซ้ายสีชมพู)
Height170 cm (5 ft 7 in)
WeightSuper Lightweight
StyleMuay Thai
(Muay Mat)
StanceSouthpaw
Professional boxing record
Total20
Wins14
By knockout11
Losses6
Medal record
Representing  Thailand
Men's amateur boxing
Southeast Asian Peninsular Games
1973 SingaporeLight Welterweight

Boonsong Mansri (Thai: บุญส่ง มั่นศรี; 13 August 1950 – 16 April 2009), known professionally as Saensak Muangsurin (Thai: แสนศักดิ์ เมืองสุรินทร์), was a Thai professional Muay Thai fighter and boxer. He was a Lumpinee Stadium Super Lightweight Champion, as well as a WBC Super Lightweight Champion in boxing, who was famous in the 1970s. He won one of the major boxing titles in his 3rd professional fight, 241 days after his debut, which is still the record after almost 50 years. He is also Thailand's heaviest world boxing champion to date. Nicknamed the "World Collapsing Southpaw", he is often regarded as one of the most fearsome punchers in Muay Thai history.