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| Dates | December 11–20, 1990 | |||||||||
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| Television | Vintage Sports (PTV) | |||||||||
| Radio network | DZAM | |||||||||
The 1990 PBA Third Conference finals was the best-of-5 championship series of the 1990 PBA Third Conference, and the conclusion of the conference's playoffs. The Purefoods Hotdogs and Alaska Milkmen played for the 47th championship contested by the league and are both gunning for their first PBA crown.
Purefoods Hotdogs finally wins their first PBA title in three years of participation, overcame a 0–2 series deficit against Alaska Milkmen to win the final three games, duplicating the feat achieved by the famed Crispa Redmanizers in 1976, as coach Baby Dalupan won his 15th championship.