Following the name of the champion(s): Indicates the number of times the competitor has held that title at that point.
[...]
Indicates a gap in the listing where title changes are not known.
<
Title was held or changed hands no later than this. In these cases, it is known that a competitor held the title at a certain time but not when he/she won it.
@
Order uncertain. Different titleholders may be known for the same year, for example, but it is not known who held the title before whom.
#
Unofficial or disputable claims. These are usually matches that certainly took place, but where there is doubt that the competitor shown should be recognized as a true title holder. These listings are also italicized.
International Boxing Union
World Lightweight Title
Willie Ritchie
1913-06
Has defeated Ad Wolgast for the world title on 12-11-28 in Colma, CA, USA; recognized by IBU upon its inception in 1913-05 (Le Sport Universel Illustré, Paris, FRA, 13-07-06).
Freddie Welsh (Frederick H. Thomas)
1914-07-07
London, ENG, GBR
Benny Leonard
1917-05-28
New York, NY, USA
Officially recognized by IBU at its convention on 20-02-05 (The Sandusky Star-Journal, Sandusky, OH, USA, 20-02-06); vacates on 25-01-15 upon (temporary) retirement.
Jimmy Goodrich
1925-07-13
Long Island City, NY, USA
Defeats Stanislaus Loayza.
Rocky Kansas
1925-12-07
Buffalo, NY, USA
Sammy Mandell
1926-07-03
Chicago, IL, USA
Al Singer
1930-07-17
New York, NY, USA
Tony Canzoneri
1930-11-14
New York, NY, USA
Officially recognized by IBU at its convention on 32-05-22 (The San Francisco Examiner, 32-05-23).
Barney Ross
1933-06-23
Chicago, IL, USA
Vacates on 35-04-15.
Tony Canzoneri [2]
1935-05-10
New York, NY, USA
Defeats Lou Ambers.
Lou Ambers
1936-09-03
New York, NY, USA
Recognized by the World Boxing Commission in 38-04 (International News Service, 38-04-22).
