Adrenaline Vault: Hardball 6
   [4/5] Review by Shawn Quigley. "HardBall 6 is a very solid title." Includes screen shots.
   http://www.avault.com/reviews/review_temp.asp?game=hball

GameSpot: HardBall 99
   Review and screen shots [5.4/10].
   http://www.gamespot.com/ps/sports/hardball99/

GameSpot: Hardball 5
   Review, tips, demo, patch, and screen shots.
   http://www.gamespot.com/pc/sports/hardball5/

GameSpot: Hardball 6
   Review, hints, demo, and patches.
   http://www.gamespot.com/pc/sports/hardball6/

HardBall 6 2000
   Official site with system requirements and game features.
   http://www.infogrames.net/games/hardball62000_pc/

Hardball '99
   Consumer reviews.
   http://www.epinions.com/game-Titles-Consoles-SonyPlaystation-All-Hardball_'99