| 1991 PBA season | |
|---|---|
| Duration | February 17 – December 15, 1991 |
| Number of teams | 8 |
| TV partner(s) | Vintage Sports (PTV) |
| 1991 PBA Draft | |
| Top draft pick | Alejandro Araneta |
| Picked by | Alaska Milkmen |
| Season MVP | Alvin Patrimonio (Purefoods TJ Hotdogs) |
| First Conference champions | Ginebra San Miguel |
| First Conference runners-up | Shell Rimula X |
| All-Filipino Conference champions | Purefoods TJ Hotdogs |
| All-Filipino Conference runners-up | Diet Sarsi Sizzlers |
| Third Conference champions | Alaska Milkmen |
| Third Conference runners-up | Ginebra San Miguel |
The 1991 PBA season was the 17th season of the Philippine Basketball Association (PBA).
| Team | Company | Governor |
|---|---|---|
| Alaska Milkmen | General Milling Corporation | Wilfred Steven Uytengsu |
| Ginebra San Miguel | La Tondeña Distillers, Inc. | Carlos Palanca III |
| Pepsi Hotshots | Pepsi-Cola Products Philippines, Inc. | Luis Lorenzo, Sr. |
| Diet Sarsi | Republic Flour Mills Corporation | Elmer Yanga |
| Presto Tivolis | Consolidated Foods Corporation | Lance Gokongwei |
| Purefoods Hotdogs | Purefoods Corporation | Renato Buhain |
| San Miguel Beermen | San Miguel Corporation | Nazario Avendaño |
| Shell Rimula X | Pilipinas Shell Petroleum Corporation | Ric Lara |
The muses for the participating teams are as follows:
| Team | Muse |
|---|---|
| Alaska Milkmen | Christine Jacob |
| Diet Sarsi Sizzlers | Gretchen Barretto |
| Ginebra San Miguel | Shireen Ledesma |
| Pepsi Hotshots | Emily Artadi |
| Presto Tivolis | Carmi Matic and Jane Ashley |
| Purefoods Hotdogs | Sofia Zobel |
| San Miguel Beermen | Nanette Medved |
| Shell Rimula X | Jennifer Pingree and Maricel Laxa |
| Pos | Team | W | L | PCT | GB | Qualification |
|---|---|---|---|---|---|---|
| 1 | Shell Rimula X | 8 | 3 | .727 | — | Semifinal round |
| 2 | San Miguel Beermen | 7 | 4 | .636 | 1 | |
| 3 | Purefoods Tender Juicy Hotdogs | 6 | 5 | .545 | 2 | |
| 4 | Diet Sarsi Sizzlers | 6 | 5 | .545 | 2 | |
| 5 | Ginebra San Miguel | 5 | 6 | .455 | 3 | |
| 6 | Presto Tivolis | 4 | 7 | .364 | 4 | |
| 7 | Alaska Milkmen | 4 | 7 | .364 | 4 | |
| 8 | Pepsi Hotshots | 4 | 7 | .364 | 4 |
|
|
| Team 1 | Series | Team 2 | Game 1 | Game 2 | Game 3 | Game 4 | Game 5 |
|---|---|---|---|---|---|---|---|
| (3) Purefoods Tender Juicy Hotdogs | 0–3 | (4) Diet Sarsi Sizzlers | 113–133 | 124–147 | 122–131 | — | — |
| Team 1 | Series | Team 2 | Game 1 | Game 2 | Game 3 | Game 4 | Game 5 | Game 6 | Game 7 |
|---|---|---|---|---|---|---|---|---|---|
| (1) Shell Rimula X | 3–4 | (2) Ginebra San Miguel | 114–109 | 114–125 (OT) | 120–113 | 127–125 (OT) | 90–116 | 119–123 | 102–104 |
| Pos | Team | W | L | PCT | GB | Qualification |
|---|---|---|---|---|---|---|
| 1 | Diet Sarsi Sizzlers | 8 | 3 | .727 | — | Semifinal round |
| 2 | Purefoods Tender Juicy Hotdogs | 7 | 4 | .636 | 1 | |
| 3 | San Miguel Beermen | 6 | 5 | .545 | 2 | |
| 4 | Tivoli Milkmasters | 6 | 5 | .545 | 2 | |
| 5 | Alaska Milkmen | 6 | 5 | .545 | 2 | |
| 6 | Ginebra San Miguel | 4 | 7 | .364 | 4 | |
| 7 | Shell Rimula X | 4 | 7 | .364 | 4 | |
| 8 | Pepsi Hotshots | 3 | 8 | .273 | 5 |
|
|
| Team 1 | Series | Team 2 | Game 1 | Game 2 | Game 3 |
|---|---|---|---|---|---|
| (3) San Miguel Beermen | 1–2 | (4) Alaska Milkmen | 99–101 | 106–96 | 93–108 |
| Team 1 | Series | Team 2 | Game 1 | Game 2 | Game 3 | Game 4 | Game 5 |
|---|---|---|---|---|---|---|---|
| (1) Purefoods Tender Juicy Hotdogs | 3–2 | (2) Diet Sarsi Sizzlers | 107–111 | 112–102 | 105–109 | 115–105 | 107–100 |
| Pos | Team | W | L | PCT | GB | Qualification |
|---|---|---|---|---|---|---|
| 1 | Pepsi Hotshots | 8 | 3 | .727 | — | Semifinal round |
| 2 | Alaska Milkmen | 7 | 4 | .636 | 1 | |
| 3 | Ginebra San Miguel | 7 | 4 | .636 | 1 | |
| 4 | San Miguel Beermen | 6 | 5 | .545 | 2 | |
| 5 | Tivoli Milkmasters | 6 | 5 | .545 | 2 | |
| 6 | Shell Rimula X | 4 | 7 | .364 | 4 | |
| 7 | Swify Mighty Meaty Hotdogs | 4 | 7 | .364 | 4 | |
| 8 | Purefoods Tender Juicy Hotdogs | 2 | 9 | .182 | 6 |
|
|
| Team 1 | Series | Team 2 | Game 1 | Game 2 | Game 3 |
|---|---|---|---|---|---|
| (3) Pepsi Hotshots | 1–2 | (4) San Miguel Beermen | 116–119 | 109–105 | 109–114 |
| Team 1 | Series | Team 2 | Game 1 | Game 2 | Game 3 | Game 4 | Game 5 |
|---|---|---|---|---|---|---|---|
| (1) Alaska Milkmen | 3–1 | (2) Ginebra San Miguel | 93–92 | 105–107 | 122–103 | 99–90 | — |
| Pos | Team | Pld | W | L | PCT | Best finish |
|---|---|---|---|---|---|---|
| 1 | Alaska Milkmen | 56 | 31 | 25 | .554 | Champions |
| 2 | Ginebra San Miguel | 60 | 33 | 27 | .550 | |
| 3 | Diet Sarsi Sizzlers/Swift Mighty Meaty Hotdogs | 58 | 31 | 27 | .534 | Finalist |
| 4 | San Miguel Beermen | 64 | 33 | 31 | .516 | Third place |
| 5 | Shell Rimula X | 48 | 23 | 25 | .479 | Finalist |
| 6 | Purefoods Tender Juicy Hotdogs | 57 | 27 | 30 | .474 | Champions |
| 7 | Pepsi Hotshots/7-Up Uncolas | 44 | 19 | 25 | .432 | Semifinalist |
| 8 | Presto Tivolis/Tivoli Milkmasters | 49 | 21 | 28 | .429 |
| Pos | Team | Pld | W | L | PCT |
|---|---|---|---|---|---|
| 1 | San Miguel Beermen | 33 | 19 | 14 | .576 |
| 2 | Diet Sarsi Sizzlers/Swift Mighty Meaty Hotdogs | 33 | 18 | 15 | .545 |
| 3 | Alaska Milkmen | 33 | 17 | 16 | .515 |
| 4 | Ginebra San Miguel | 33 | 16 | 17 | .485 |
| 5 | Presto Tivolis/Tivoli Milkmasters | 33 | 16 | 17 | .485 |
| 6 | Shell Rimula X | 33 | 16 | 17 | .485 |
| 7 | Purefoods Tender Juicy Hotdogs | 33 | 15 | 18 | .455 |
| 8 | Pepsi Hotshots/7-Up Uncolas | 33 | 15 | 18 | .455 |
| Pos | Team | Pld | W | L |
|---|---|---|---|---|
| 1 | Ginebra San Miguel | 27 | 17 | 10 |
| 2 | Alaska Milkmen | 23 | 14 | 9 |
| 3 | San Miguel Beermen | 31 | 14 | 17 |
| 4 | Diet Sarsi Sizzlers/Swift Mighty Meaty Hotdogs | 25 | 13 | 12 |
| 5 | Purefoods Tender Juicy Hotdogs | 24 | 12 | 12 |
| 6 | Shell Rimula X | 15 | 7 | 8 |
| 7 | Presto Tivolis/Tivoli Milkmasters | 16 | 5 | 11 |
| 8 | Pepsi Hotshots/7-Up Uncolas | 11 | 4 | 7 |