This is a scrapbook compiled by Alphonse Case (A.C.) “Phonney” Martin concerning the invention of the curve ball. This scrapbook consists of typed manuscript pages, clippings, correspondence, and handwritten notes, dated between 1845 and 1933.

The Frank and Peggy Steele sheet music collection includes over 350 pieces of sheet music that document the role of music in baseball history. The materials date from 1885 to 1992 and include images and illustrations of baseball fans, players, and management. The collection includes music written about baseball, songs that are tangentially connected to the sport, and popular music that uses baseball art on its cover.

A collection of research notes, manuscripts, and transcripts created and compiled by Jeff Katz in the writing of his book titled "Split Season: 1981", published in 2015.

A collection of articles, clippings, dissertations, book excerpts, publications, photographic material, research notes, and correspondence relating to 19th century black baseball research by Jerry Malloy.

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

A collection of clippings, articles, photographs, contracts, agreements, and financial reports related to the executive careers of the Veeck family, primarily Michael.

The collection documents Norman Small's career in Minor League Baseball. It contains scrapbooks, photographic materials, a manuscript, and a micro-casette.

This is a collection of correspondence, manuscript, interviews and personal observations relating to the life and career of Frank Frisch. Radio transcripts for the baseball seasons of 1957 through 1960 and one undated folder.

A collection of correspondence and questionnaires created by Rev. G. Richard McKelvey and used in the writing of his baseball books.

This is a collection of manuscripts, correspondence, newspaper articles and audiocassettes and reel-to-reels relating to books written by Robert Creamer.