The Niners were a baseball team formed by Captain Benjamin Sisko to play against Captain Solok's team, the Logicians, in 2375. Its players were all residents of Deep Space 9. Odo served as the game's umpire.
After a shaky training period, the Niners and the Logicians played a match. The Vulcans from the USS T'Kumbra defeated the Niners, although Sisko's team still celebrated, much to the irritation of Solok. (DS9 episode: "Take Me Out to the Holosuite")
The Niners, as the "home team", wore white uniforms with black pin stripes, a red belt, with red stirrup socks, and a red shirt beneath their jerseys. The team name "NINERS" was printed across the front of the jersey in red letters with black trim, and each player's surname and jersey number was on the back in the same color scheme. The cap was navy blue or black with a logo consisting of a baseball and a red silhouette of Deep Space 9. The same logo was on a patch on the uniform's left sleeve.
- 7 Quark — right fielder
- 9 Kira Nerys — shortstop
- 13 Rom — pinch hitter
- 22 Julian Bashir — right fielder/second baseman
- 15 Benjamin Sisko — second baseman/manager
- 25 Nog — catcher
- 32 Worf — first baseman
- 34 Miles O'Brien — coach/manager
- 43 Ezri Dax — Center fielder
- 47 Kasidy Yates — third baseman
- 55 Leeta — left fielder
- 78 Jake Sisko — pitcher