Young Perez won the NBA and IBU world flyweight crowns #OnThisDay in 1931 by KO'ing Frankie Genaro in Round 2 of a scheduled 15 at the Palais des Sports in Paris.

World Featherweight Champion Abe Attell won a 10-round decision victory over rising star Johnny Kilbane at the Hippodrome in Kansas City #OnThisDay in 1910. A crowd of around 3,000 witnessed the clash between the famed "Little Hebrew" and the man who would later dethrone him.

World Lightweight Champion Benny Leonard, aka "The Ghetto Wizard", KO'd "Toughy" Ramser in Round 7 of a scheduled 10 in a non-title scrap in Cleveland, Ohio, #OnThisDay in 1917. The bout was Leonard's fourth in just six days and followed wins over Jack Britton, Eddie Wagond and Young George Erne.

World Middleweight Champion Al McCoy (Alexander Rudolph) was born in Rosenhayn, New Jersey, #OnThisDay in 1894.

Future triple-weight king Barney Ross demolished Sammy Binder #OnThisDay in 1930, stopping him in Round 2 of a scheduled 6 at Chicago Stadium. The Chicago Tribune reported that the referee jumped in to halt the clash after Ross "crashed" through his opponent's defences and "had him helpless and reeling unprotected in the centre of the ring".

Former World Welterweight Champion Ted "Kid" Lewis won a six-round newspaper decision over Marcel Thomas in Jersey City #OnThisDay in 1920. Lewis floored Thomas twice on his way to victory at the International League Baseball Park in a clash that was part of the undercard for the light heavyweight world title fight between Georges Carpentier and Battling Levinsky. Thomas was one of Carpentier's sparring partners.

World Lightweight Champion Benny Leonard stopped Johnny Sheppard in Round 3 of a scheduled 12 at the 6th Regiment Armory in Paterson, New Jersey, #OnThisDay in 1920. The Paterson Evening News reported that Leonard gave a "marvelous" exhibition of boxing before dishing out a beatdown in the third stanza which left Sheppard "staggering" and "fleeing from his oppressor as a mouse seeks to avoid its pursuer". The referee stepped in to halt the clash and save the "all but out" and "doomed" Sheppard from being KO'd.

A legend returns... Former World Lightweight Champion Benny Leonard left retirement and stepped into the ring for the first time in seven years #OnThisDay in 1931. "The Ghetto Wizard" made short work of Pal Silvers, flattening his opponent in Round 2 of a scheduled 10 and securing a TKO win in front of around 16,000 fans at Queensboro Stadium in Long Island City, New York. The crowd were unimpressed - the victory was greeted by booing amid suspicions Silvers may have taken a dive.

Future World Junior Welterweight Champion Jackie "Kid" Berg won a 10-round points victory over "Fighting Florist" Phil McGraw in front of around 4,000 fans at St. Nicholas Arena in New York #OnThisDay in 1929.

World Lightweight Champion Benny Leonard made short work of Eddie Dorsey #OnThisDay in 1917, knocking him out in Round 2 of a scheduled 10 in front of around 6,000 fans at the Broadway Auditorium in Buffalo, New York. The Buffalo Courier said of Leonard: "He is perfection itself, a marvelous fighting machine with the balance of an expert, the execution of a master and a hitting power greater than Joe Gans ever could boast." Dorsey, speaking afterwards, described "The Ghetto Wizard" as "The greatest fighter that ever put foot in a shoe" and added: "My, but that boy can box, and Lordy, how he does hit."

Lightweight king Benny Leonard won a six-round newspaper decision victory over Harry Pierce in a non-title clash at the Olympia AA in Philadelphia #OnThisDay in 1918. "The Ghetto Wizard" reportedly dished out a bit of a shellacking but Pierce remained on his feet and proved a game and durable opponent.