NBA Live 99 is EA Sports' NBA release for the 1998–99 NBA season. Major additions include Practice Mode and multi-season play, which features player development between seasons. Although free agency or generated rookies were not included, this would be the forerunner to Franchise Mode.
Live 99 shipped with 1997–98 NBA season rosters due to the 1998–99 NBA lockout, putting a hold on player movements and rookie signings during the summer of 1998. Prominent bugs led to the NBA Live Series Center fan site submitting a patch petition to EA Sports, resulting in two official patches which included roster updates for the 98–99 season.
As Live 99 kept the same file formats as Live 98, patchers were able to produce the same wide variety of patches using an updated version of the EA Graphics Editor and the NBA Live 99 Toolkit.