James Belcher, also known as Jem Belcher (15 April 1781 – 30 July 1811) was an English bare-knuckle prize-fighter and Champion of All England 1800-1805.
He was born at his father's house in St. James's churchyard, Bristol, on 15 April 1781. His mother was a daughter of Jack Slack (d. 1778), a noted pugilist, who defeated Jack Broughton in April 1750. 'Jem' Belcher followed the trade of a butcher, though he was never formally apprenticed, and signalised himself when a lad by pugilistic and other feats at Lansdown fair. He was a natural fighter, owing little to instruction in the art. His form is described as elegant ; he was, at any rate, good-humoured, finely proportioned, and well-looking. He came to London in 1798 and sparred with Bill Warr, a veteran boxer, of Covent Garden. On 12 April 1799, after a fight of thirty-three minutes, he beat Tom Jones of Paddington at Wormwood Scrubbs in the Middleweight Championship of England.
He drew with champion Jack Bartholomew in a 51-round bout in 1799, but in the following year, on 18 May 1800, on Finchley Common, the 19-year-old Belcher, after seventeen rounds, knocked out the 37-year-old Bartholomew out with a 'terrific' body blow to win the rematch and become champion.
On 22 Dec. 1800, near Abershaw's gibbet on Wimbledon Common, he defeated Andrew Gamble, the Irish champion, in five rounds, Gamble being utterly confounded by his opponent's quickness. On 25 Nov. 1801 he met Joe Berks of Wem, and defeated him after sixteen rounds of desperate fighting. He fought him again on 20 Aug. 1802, and Berks retired at the end of the fourteenth round, by which time he could scarcely stand and was shockingly cut about the face. In April 1803 he severely punished John Firby, 'the young ruffian,' in a hastily arranged encounter. Next month he had to appear before Lord Ellenborough in the court of king's bench for rioting and fighting, upon which occasion he was defended by Erskine and Francis Const.
In July 1803 Belcher lost an eye owing to an accident when playing at rackets. His high spirit and constitution forthwith declined, but placed by his friends in the 'snug tavern' of the Jolly Brewers in Wardour Street, evaded challenges to his title until 1805. Jealousy of a former pupil, Hen Pearce, the ' Bristol game-chicken,' once more to try his fortune in the ring. He had a terrible battle with Pearce on Barnby Moor, near Doncaster, on 6 Dec. 1805. He displayed all his old courage but not his old skill or form, and was defeated in eighteen rounds.