World Series Baseball 2K1

World Series Baseball 2K1 (ワールドシリーズ ベースボール 2K1, Wārudo Shirīzu Bēsubōru 2K1) is a sports video game developed by WOW Entertainment and published by Sega for the Dreamcast in 2000.

It was the first game in the modern series to be featured on the Dreamcast, and was the spiritual successor to World Series Baseball for the Sega Genesis. It was released in July 2000 to coincide with the 2000 Major League Baseball All-Star Game in Atlanta.

World Series Baseball 2K1 was the first game in the series since World Series Baseball '98 in 1997. Sega had announced that a World Series Baseball game would be a launch title for the Dreamcast's 1998 release, but the Dreamcast launched without any baseball games.