World Series Baseball, conhecido no Japão como Hideo Nomo World Series Baseball, é um jogo de beisebol Sega Saturn desenvolvido e publicado pela Sega. An entry in the titular World Series Baseball series of baseball titles, the game was first released in the United States in November 1995, with a worldwide release in the following months. In Japan, World Series Baseball game is sponsored by professional Japanese baseball player Hideo Nomo. O jogo mais tarde recebeu uma sequência em 1996, World Series Baseball II. This Saturn version is unrelated to the Sega Mega Drive and Sega Game Gear games of the same name - it is a brand new entry, despite not having a brand new name (although during development it was known as Grand Slam Baseball), which takes advantage of the system's 3D graphics. Versão japonesa possivelmente para fazer essa distinção, sendo patrocinada por Hideo Nomo. Isso, é claro, pode causar mais confusão, pois também há um Nomo Hideo no World Series Baseball para o Game Gear. It would not be the last game to disregard previous entries in the series - a 2001 World Series Baseball exists also.