Slamboree 1999 took place on May 9, 1999 from the TWA Dome in St. Louis, Missouri.
Ric Flair originally won his match against Roddy Piper by pinfall, but Eric Bischoff came out and disqualified Flair for hitting Piper with a foreign object. Following the match Piper immediately fired Flair.
- DARK - Dale Torborg defeated Johnny Swinger
- Raven and Perry Saturn defeated Rey Misterio, Jr. and Billy Kidman (c), and Dean Malenko and Chris Benoit (with Arn Anderson) - Triangle match for the WCW World Tag Team Championship
- Konnan defeated Stevie Ray (with Vincent and Horace Hogan)
- Bam Bam Bigelow defeated Brian Knobs - "King of Hardcore".Hardcore
- Rick Steiner defeated Booker T (c) for the WCW World Television Championship
- Gorgeous George (with Madusa, Miss Madness and Randy Savage) defeated Charles Robinson (with The Head Nurse and Ric Flair)
- Scott Steiner (c) defeated Buff Bagwell for the WCW United States Championship
- Roddy Piper defeated Ric Flair (with Arn Anderson and The Head Nurse) by disqualification for control of WCW
- Sting fought Goldberg to a no contest
- Kevin Nash defeated Diamond Dallas Page (c) for the WCW World Heavyweight Championship