|Real name||Boonsong Mansri|
Broken World Southpaw
|Rated at||Light welterweight|
|Height||5 ft. 7 in. (170 cm)|
August 13, 1950|
Phetchabun Province, Thailand
|Died||April 16, 2009
Rajvithi Hospital, Bangkok, Thailand
|Wins by KO||11|
Saensak Muangsurin (13 August 1950 – 16 April 2009) was a retired professional boxer from Phetchabun, Thailand. He was a former WBC light welterweight champion, who set a world record by winning the world title in only his 3rd professional fight.
Saensak made his formal professional boxing debut on November 16, 1974, with a first-round knockout win. He won his second fight in February 1975 by technical knockout in round 7, and challenged Perico Fernandez for the WBC light welterweight title in his third professional fight. He defeated Fernandez by technical knockout in the 8th round on July 15, 1975, to set a world record for taking the shortest time to win the world title; it had been less than a year since he made his debut in 1974.
Saensak lost his world title in his second defense against Miguel Velasquez after being disqualified in the 5th round, but quickly regained it four months later on October 29, 1976, by knocking out Velasquez in two rounds. He successfully defended the WBC belt 7 times (8 total including his defense prior to the disqualification against Velasquez), most notably against former WBC lightweight champion Guts Ishimatsu, whom he knocked out in six rounds.
Saensak was also an accomplished muay thai practitioner, and fought in several muay thai matches held in Japan prior to winning the world title. He was knocked out by Sang Hyun Kim in the 13th round to lose his world title on December 30, 1978. He fell into relative obscurity from then on, losing both of his fights in 1979, one of which was a third-round knockout loss to Thomas Hearns. His last professional fight was for the OPBF welterweight title, which he lost by decision over 12 rounds. His record was 14–6–0 (11 KOs).
In 2014 Vasyl Lomachenko equaled the record of winning a world title in his third bout. Saensak still has the record for the fastest time though, having taken 11 days less than the Ukrainian.
|14 Wins (11 Knockouts, 3 Decisions), 6 Losses, 0 Draws|
|Loss||14-6||Chung-Jae Hwang||MD||12||1981-04-05||Roi-Et, Thailand||For OPBF Welterweight title|
|Loss||14-5||Andoni Amana||UD||10||1980-11-13||Bilbao, País Vasco, Spain|
|Win||14-4||Mike DeGuzman||TKO||5 (10)||1980-09-30||Jirapravat Stadium, Nakhon Sawan, Thailand|
|Loss||13-4||Thomas Hearns||TKO||3 (10)||1979-10-18||Olympia Stadium, Detroit, Michigan, USA|
|Loss||13-3||Dan DeGuzman||SD||10||1979-07-20||Manila, Metro Manila, Philippines|
|Loss||13-2||Sang-Hyun Kim||TKO||13 (15)||1978-12-30||Munhwa Gymnasium, Seoul, South Korea||Lost WBC Super Lightweight title|
|Win||13-1||Francisco Moreno||TKO||13 (15)||1978-04-08||Municipality Stadium, Hat Yai, Thailand||Retained WBC Super Lightweight title|
|Win||12-1||Jo Kimpuani||TKO||14 (15)||1977-12-30||Tung Na-Chai Stadium, Chantaburi, Thailand||Retained WBC Super Lightweight title|
|Win||11-1||Saoul Mamby||SD||15||1977-10-23||Open-Air Stadium, Nakhon Ratchasima, Thailand||Retained WBC Super Lightweight title|
|Win||10-1||Mike Everett||TKO||6 (15)||1977-08-20||Open-Air Stadium, Roi-Et, Thailand||Retained WBC Super Lightweight title|
|Win||9-1||Perico Fernandez||UD||15||1977-06-17||Palacio de los Deportes, Madrid, Madrid, Spain||Retained WBC Super Lightweight title|
|Win||8-1||Guts Ishimatsu||KO||6 (15)||1977-04-02||Kokugikan, Tokyo, Japan||Retained WBC Super Lightweight title|
|Win||7-1||Monroe Brooks||TKO||15 (15)||1977-01-15||Open-Air Stadium, Chiang Mai, Thailand||Retained WBC Super Lightweight title|
|Win||6-1||Miguel Velazquez||TKO||2 (15)||1976-10-29||Hermanos Maristas Sports Pavilion, Segovia, Castilla y León, Spain||Won WBC Super Lightweight title|
|Loss||5-1||Miguel Velazquez||DQ||5 (15)||1976-06-30||Palacio de los Deportes, Madrid, Madrid, Spain||Lost WBC Super Lightweight title|
|Win||5-0||Lion Furuyama||UD||15||1976-01-25||Nihon University, Tokyo, Japan||Retained WBC Super Lightweight title|
|Win||4-0||Ely Yares||KO||6 (10)||1975-12-13||Hua Mark Stadium, Bangkok, Thailand|
|Win||3-0||Perico Fernandez||KO||8 (15)||1975-07-15||Hua Mark Stadium, Bangkok, Thailand||Won WBC Super Lightweight title|
|Win||2-0||Lion Furuyama||TKO||7 (10)||1975-02-16||Hua Mark Stadium, Bangkok, Thailand|
|Win||1-0||Rudy Barro||KO||1 (10)||1974-11-16||Hua Mark Stadium, Bangkok, Thailand||Professional Debut|
Saensak was admitted to Rajvithi Hospital on April 12, 2009 for liver failure and intestinal blockage. Surgery failed to improve his condition, which was complicated by Saensak being afflicted by various ailments. On April 16, Saensak died while under observation in an intensive care unit.
|WBC Light welterweight Champion
July 15, 1975 - June 30, 1976
|WBC Light welterweight Champion
October 29, 1976 - December 30, 1978
Sang Hyun Kim
- Thangarajah, Edward (17/04/09). "Thai legend Saensak dies at 58". Bangkok Post. Retrieved 2009-04-18. Check date values in: