1989 San Miguel Beermen season

The San Miguel Beermen became the third team in PBA Annals History to win the Grandslam, duplicating the feat achieved by the famed Crispa Redmanizers, first in 1976 and in 1983.

San Miguel and Purefoods Hotdogs, two equally talented teams, eventually played in the championship series in a highly anticipated All-Filipino finals affair.

March 16: San Miguel carved out a 118–107 win over Presto Ice Cream as the Beermen swept the first round of eliminations in the Open Conference.

[4] July 2: Franz Pumaren scored on a go-ahead layup with three ticks left as San Miguel nip Purefoods, 117–116, in the first meeting between two-highly rated teams in the All-Filipino Conference.

July 25: The Beermen snapped a two-game losing streak with a 123–115 win over eliminated-Presto Tivolis and avenged their first round loss to this same team last June 29.

[6] August 6: The "Skywalker" returns as the buzzer-beating basket by Samboy Lim on a perfect pass by Bobby Jose gave San Miguel a narrow 121–120 win over Formula Shell, which placed the game under protest.