For boxer John Leonardi in the 1930's, I found some articles giving information about additional fights not listed under his record on the site.
- 118-Pound Final - Willie Escoe, Hudson Guild, defeated John Leonardi, unattached, Semi-Monthly Amateur Boxing, Location St. Mary's Knights of Columbus, Dec 1930
Source: Times Union, Brooklyn, New Yori, Sat, Dec 6, 1930, Page 26
- 128-pound Class - John Leonardi, Long Island City Moose Club, knocked out John DeLase, unattached, in 2:10 of the third round. Location: Long Island Moose amateur boxing bouts. March 1931
Source: Times Union, Brooklyn, New Yori, Sat, Mar 28, 1931, Page 25
- 138-pound Special - Johnny Vitale, Maris Stella Council, Knights of Columbus Boxer, outpointed John Leonardi, Long Island City Moose Club. Location: Queensboro Lodge of the Elks in Elmhurst, Amateur Boxing Show. Nov 18, 1932
Source: Times Union, Brooklyn, New York. Sat, Nov 19, 1932, Page 11
- John Leonardi, Long Island Moose Club, TKO'd Joseph (Joe) Hammond, 1st Round 33 seconds. Dec 11, 1933. Metropolitan A. A. U. Championships. Amateur Boxing. Location: Madison Square Garden. Dec 11, 1933.
Source: Times Union, Brooklyn, New York. Tues, Dec 12, 1933, Page 12
Source: The Brooklyn Daily Eagle. Brooklyn, New York, Tue, Dec 12, 1933, Page 23
- 147-Pound Class - Arthur Diaz, West Side Y.M.C.A., defeats John Leonardi, Long Island Moose Club. 3/3 Rounds, Decision. Event: Metropolitan A.A.U, Location: Madison Square Garden. Dec 13, 1933
Source: Daily News. New York, New York. Thu, Dec 14, 1933, Page 69
- 160-Pound Class - Bruno Zorzenone (Italy) defeats John Leonardi (U.S.A.) 3/3 Rounds. at the Y.M.C.A. June 9, 1937. International Golden Gloves Amateur Boxing Championships. Location: Yankee Stadium. June 9, 1937
Source: The Boston Globe, Boston Massachusetts. Thursday, June 10, 1937 Page 31
Source: Daily News, New York, New York, Thu, Hun 10, 1937 Page 60
- 147-Pound Class - Fred Cabral (Boston) defeats John Leonardi. Location: Municipal Playgrounds A. A. New York. Decision. Sep 1937.
Source: The Brooklyn Daily Eagle, Brooklyn, New Yori. Fri, Sep 24, 1937, Page 19
- John Leonardi (Municipal Playground) defeats Paul Carafiello (Tuckahoe Police) TKO, 2/3 , 1:32. Sub-Novice. New York Downtown Athletic Club. Date: Feb 1, 1938
Source: Daily News, New York, New York. Wed, Feb 2, 1938
- John Leonardi (Municipal Playground) defeated Dick Cramer (Municipal Playground) Second Round. Date: Feb 9, 1938. Location: Downtown Athletic Club.
Source: Daily News: Fri, Feb 11, 1938 Page 60