1998 PBA All-Filipino Cup
The 1998 Philippine Basketball Association Centennial All-Filipino Cup, also known as the 1998 McDonald's-PBA All-Filipino Cup for sponsorship reasons, was the first conference of the 1998 PBA season. It started on February 1 and ended on May 8, 1998. The tournament is an All-Filipino format, which doesn't require an import or a pure-foreign player for each team.
Format
The following format will be observed for the duration of the conference:- The teams were divided into 2 groups.
- Alaska Milkmen
- Gordon's Gin Boars
- Formula Shell
- San Miguel Beermen
- Mobiline Phone Pals
- Sta. Lucia Realtors
- Purefoods Carne Norte Beefies
- Pop Cola 800s
- Teams in a group will play against each other once and against teams in the other group twice; 11 games per team; Teams are then seeded by basis on win-loss records. Ties are broken among point differentials of the tied teams. Standings will be determined in one league table; teams do not qualify by basis of groupings.
- The top six teams after the eliminations will advance to the semifinals.
- Semifinals will be two round robin affairs with the remaining teams. Results from the elimination round will be carried over. A playoff incentive for a finals berth will be given to the team that will win at least seven of their ten semifinal games.
- The top two teams will face each other in a best-of-seven championship series. The next two teams will qualify for a one-game playoff for third place.
Elimination round
Team standings
| # | Team | W | L | PCT | GB |
| 1 | Alaska Milkmen | 9 | 2 | .818 | -- |
| 2 | San Miguel Beermen | 7 | 4 | .636 | 2 |
| 3 | Sta. Lucia Realtors | 5 | 6 | .455 | 4 |
| 4 | Pop Cola 800s | 5 | 6 | .455 | 4 |
| 5 | Purefoods Carne Norte Beefies | 5 | 6 | .455 | 4 |
| 6 | Gordon's Gin Boars | 5 | 6 | .455 | 4 |
| 7 | Mobiline Phone Pals | 4 | 7 | .364 | 5 |
| 8 | Formula Shell Zoom Masters | 4 | 7 | .364 | 5 |