the World 150 lbs Welterweight Title. He defeated Jack "Twin" Sullivan, brother of 1907 world welterweight champion Mike "Twin" Sullivan, on April 4, 1910 at the Marathon Athletic Club in Brooklyn, in a ten round newspaper decision of the New York Times. Bout with world welterweight contender Frank Mantell, 1910 On December 2, 1910, Burke lost a well-publicized ten round newspaper decision to Frank Mantell, a former world welterweight contender, at the New Amsterdam Opera House in New York. Burke took a great deal of punishment in the bout from his accomplished opponent, and was fighting as a heavyweight at this late point in his career. Burke got in several good jabs in the fourth, but then retreated and fought from a distance. As was his habit with superior opponents, he clinched frequently, though Mantell often dealt some of his best blows during clinches. Mantell had previously fought welterweight champions Harry Lewis and Honey Mellody in November of 1907 and January of 1908 in bouts billed but not sanctioned as world championships. Mantell defeated Mellody in a fifteenth round knockout in their January bout, though no title was passed to him. On April 10, 1911 he fought Dan Sullivan of Montana at the New York Athletic Club and won. On May 9, 1911 he lost to Dan's brother, Montana Jack Sullivan, at the Olympic Athletic Club. Later career, and boxing retirement Win over World Middleweight claimant Billy Papke, 1911 On August 22, 1911, he defeated Billy Papke, two time World Middleweight contender, at St. Nicholas Arena in New York City in a newspaper decision of the New York Times. Papke was defending his World Middleweight title which he claimed from Jim Sullivan in a British World Middleweight Championship match, in a winning ninth round knockout two months earlier on June 8, 1911 at London's Palladium. Despite Papke's claim, the title did not pass hands as both men were over the middleweight weight limit of 160, and weighing nearer 165. Papke had no claim to the American title that August, as it was not recognized by boxing authorities, who credited Papke with the title only from September 7 to November of 1908, when he defeated and then again lost to reigning champion Stanley Ketchell. Burke battered Papke, but used little science in his approach. Attending the fight was the Marquis of Queensbury, credited with the invention of modern boxing rules. On