Correspondence, family papers, speeches and writings, memoranda, scouting and other reports, notes, subject files, scrapbooks, and other papers documenting Rickey's career as a major league baseball manager and executive. Also documents his contributions to the sport such as the minor league farm team system, signing Jackie Robinson as the first African American player to a major league contract, and developing the St. Louis Cardinals, Brooklyn Dodgers, and Pittsburgh Pirates into pennant winning clubs. Includes evaluations of players Hank Aaron, Lou Brock, Steve Carlton, Roberto Clemente, Dizzy Dean, Don Drysdale, Curt Flood, Bob Gibson, Sandy Koufax, Willie Mays, Bill Mazeroski, Stan Musial, and Pete Rose. Other topics include Rickey's affiliations with Delta Tau Delta Fraternity, Fellowship of Christian Athletes, Ohio Wesleyan University, U.S. President's Committee on Government Employment Policy, and Young Men's Christian associations; bond drive work during World War II; and his family and personal life.

Correspondents include Red Barber, Joe L. Brown, Roy Campanella, Archibald J. Carey, Louis F. Carroll, Robert H. Cobb, Lester L. Colbert, Jack Kent Cooke, Bing Crosby, Thomas J. Cuff, Arthur Daley, Leo Durocher, Dwight D. Eisenhower, Clarence E. Eldridge, John W. Galbreath, Howie Haak, Blake Harper, Herbert Hoover, Rogers Hornsby, Robert L. Howsam, Charles S. Kelchner, Ralph Kiner, Fiorello H. La Guardia, Kenesaw Mountain Landis, Alfred M. Landon, Lee MacPhail, Arthur Mann, W. C. Matthews, G. Herbert McCracken, Edward R. Murrow, Walter F. O'Malley, Harry Ornest, Norman Vincent Peale, C. E. Persons, Pee Wee Reese, Branch Rickey, Jr., Jackie Robinson, Harold J. Roettger, Art Rooney, Walter A. Shea, George Sisler, George Silvey, J. G. Taylor Spink, William A. Shea, Raymond Thornburg, and George M. Trautman.