A baseball team based in Pike City on the Federation colony of Cestus III, for which the younger brother of freighter captain Kasidy Yates played.
The Pike City Pioneers are one of the teams in a baseball league newly founded by the colonists of Cestus III, at a time when the sport has long since died out on Earth.
The team comes up in Family Business, when Kasidy Yates wins over Benjamin Sisko by mentioning that her brother plays for the Pioneers and that she has a recording of one of their games. The two listen to it together, and their shared interest in the game becomes a running thread of their relationship.
The Cestus III league is mentioned again later in the series, and Sisko's own love of baseball eventually leads him to field a station team in Take Me Out to the Holosuite.