He joined the BBC in 1949 and was the corporation's full-time boxing correspondent from 1962 until his retirement in 1994, when Jim Neilly replaced him in that capacity. He served as a boxing columnist for the Sporting Record from 1950 to 1954. He then worked for the Daily Mail as a boxing writer and sports columnist from 1954 to 1962. While writing for the national papers, Carpenter broadcast regularly on radio and television, covering thousands of professional and amateur fights including all Olympic Games from 1956 until 1992. He wrote three books about boxing, produced the documentary, The Richest Prize in Sport, and served as the voice of the Hall of Fame series, Sports Archive and Great Moments in Sport. Carpenter described the end of the historic boxing fight between George Foreman and Muhammad Ali in Zaire, in 1974, a fight which became known as "The Rumble in the Jungle", as "the most extraordinary few seconds that I have ever seen in a boxing ring". While occasionally given to raising his voice, as he did when Ali knocked out Foreman or when Barry McGuigan floored Eusebio Pedroza in 1985, Carpenter was widely regarded as unflappable and a great professional. Nowhere was this more apparent than at the fight between "Marvelous" Marvin Hagler and Alan Minter at the Empire Pool in 1980: after Hagler stopped Minter in the third round, the crowd, some of them fuelled by drink and hatred, expressed their displeasure by hurling beer cans and bottles into the ring. While other members of the press hid under their chairs or protected themselves with typewriters, Carpenter continued to broadcast what he called "a shame and a disgrace to British boxing", even after he was struck several times with missiles. Carpenter's rapport with former WBCWorld Heavyweight ChampionFrank Bruno was well known. Carpenter often conducted post-match interviews with Bruno, whose catchphrase was "know what I mean, 'Arry?". Bruno's agent later stated that Bruno saw Carpenter as a "real friend." Over his career, which spanned across decades, Carpenter was recognised as "The Voice of Boxing." While his name was most often associated with boxing, Carpenter established himself as one of Britain's most versatile sportscasters, covering many of the major sporting events. He was a presenter of Sportsnight between 1975 and 1985 and a regular member of the broadcast team on Grandstand. He covered all major golf tournaments from 1965 until his retirement. He also served as commentator on the Oxford and CambridgeUniversity Boat Race, and greyhound racing. He anchored Wimbledon for the BBC from 1967 until 1993. His connection with greyhound racing began when he was a journalist for a national publication called the Greyhound Owner. He later commentated on the annual BBC Television Trophy shown on Sportsnight.