A collection of 630 audio recordings on standard audiocassette and open reel audiotape of baseball games from 1929 to 1998, including regular season, All-Star, and post-season games along with memorial tribute to Col. Ruppert, College All-Star Game, tribute to Harry Caray and historic moments in baseball such as the first game at the Astrodome, Ted Williams' first game as a manager, Henry Aaron's 715th home run, Mark McGwire's 62nd home run and Roger Clemens' 18 K game.

This collection contains Seattle Mariners tickets, scoresheets, and Seattle Mariners Women's Club newsletters, created between 1977 and 2024. The tickets and scoresheets are primarily to regular season games, but some post-season and spring training tickets are also present.