The scratch baseball team assembled by Captain Sisko from his crew, family and friends to face an all-Vulcan side in a holosuite game, losing heavily but celebrating anyway.
The Niners are the team Benjamin Sisko forms in the Deep Space Nine episode Take Me Out to the Holosuite, after his old rival Captain Solok challenges him to a game of baseball.
Almost none of the players have touched a bat before. The side includes Jake Sisko as pitcher, Nog as catcher, Kira, Worf, Bashir, Ezri Dax, Quark, Leeta and Kasidy Yates, with O'Brien coaching after an injury and Odo serving as umpire. Sisko's obsession with beating Solok leads him to throw the clumsy Rom off the team, to the anger of the others.
The Vulcans win ten runs to one, but the single run comes when Rom, sent in late, lays down an accidental bunt that brings Nog home. The Niners celebrate so happily that Solok cannot understand it.