Records of the American League Base Ball Club of New York and its minor league affiliates, consists almost exclusively of business and financial records, some of which date back to the earliest days of the Yankees organization.

A collection of 25 scrapbooks relating to the career of Babe Ruth between 1921 and 1935. These were created by his manager, Christy Walsh.

A cartoon collection by Bob Coyne, primarily Boston Red Sox and New York Yankee players.

A collection of 718 scored scorecards kept by Carl Etz between 1938 and 1989.

This is a collection of correspondence, court documents and newspaper clippings relating to the lawsuits against A.B. Chandler et al. and the New York Yankees.

A collection of newspaper clippings, correspondence, statistics, research notes, and photographs related to the Ferrell family, dated 1911-2005. This was created and/or compiled by Dick Thompson for his book on the Ferrell brothers.

This collection contains the papers of Edward Grant "Ed" Barrow, who held numerous positions in professional baseball in the first two decades of the 20th century before entering the front office for the New York Yankees in 1921. This collection contains a variety of Barrow's personal papers from his time as Yankees president and continue on to the time of his death in 1953. These papers consist of correspondence, legal documents, telegrams, clippings, photos, and other ephemera.

A collection of interview transcripts, audiocassettes, clippings, and articles conducted and written by Leo Trachtenberg between 1984 and 2006.

This collection contains the papers of Leon Hamilton, high school athlete, House of David team member, boxer, baseball and basketball player, and baseball scout. Hamilton's scouting career spanned four organizations and five decades. Hamilton's papers are in the form of awards and certificates, brochures, clippings, contracts, correspondence, decals, dinner programs, game programs, photographs, and scouting materials.