The 1998–99 NBA season was the Spurs' 32nd season as a franchise, the 26th in San Antonio, and the 23rd in the National Basketball Association. During the offseason, the Spurs acquired second-year guard Antonio Daniels from the Vancouver Grizzlies and signed free agents Mario Elie, Steve Kerr and Jerome Kersey. After a promising rookie season from second-year star Tim Duncan, Spurs fans had to wait three and a half months as part of the NBA regular season was wiped out by a lockout. When the season started, the Spurs started slowly, posting a 6–8 record in February. However, in March and April, they won 31 of their final 36 games on their way to a league-best record, 37–13.

In the playoffs, the Spurs defeated the Minnesota Timberwolves in four games of the first round winning three games to one. In the semifinals, the Spurs' "Twin Towers" of David Robinson and Tim Duncan outplayed Shaquille O'Neal as the Spurs swept the Los Angeles Lakers in four straight games. In the Western Conference Finals, the Spurs faced the Portland Trail Blazers. After taking Game 1, the Spurs trailed in Game 2 as the Blazers led by double digits. However, in the fourth quarter, the Spurs made a run and with 0.9 seconds left, Sean Elliott tip-toed down the sidelines staying barely inbounds to nail a game-winning three-pointer. From there, the Spurs would go on to sweep the Trail Blazers to become the first former American Basketball Association (ABA) team to play in the NBA Finals. In the Finals, they defeated the 8th-seeded New York Knicks in five games. Avery Johnson hit the title-winning three with 47 seconds left to seal the Spurs' first title in franchise history. Following the season, Will Perdue re-signed as a free agent with the Chicago Bulls.

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