Facts: - weight: welterweight - draws: 0 - losses: 4 - caption: curvis wearing one of his lonsdale belts in 1964 - ko: 22 - style: southpaw - death date: 9 january 2012 - total: 41 - birth date: 14 august 1937 - name: brian curvis - nationality: british - image: brian curvis with lonsdale belt.jpg - birth place: swansea , wales - wins: 37 Based on these bullet points, write a short biography describing the life of brian curvis .
The answer to this question is:
brian nancurvis -lrb- 14 august 1937 -- 9 january 2012 -rrb- , who fought under the name brian curvis as a professional , was a boxer from swansea , wales who was active from 1959 to 1966 .he fought as a welterweight , becoming british welterweight champion in 1960 .he retired as undefeated champion and is the only welterweight to have won two lonsdale belts outright .the four defeats in his professional career were all to foreign boxers ; he was never beaten by a british boxer .