Bill Laimbeer dropped 31 points when grabbing 20+ rebounds against the Suns on January 26, 1990.

30 points and 20 rebounds in a game as a player bill laimbeer
Interpreted as:
30 or more points and 20 or more rebounds in a regular-season game as a player Bill Laimbeer
PTS
1/26/1990Laimbeer2/11/1987Laimbeer2/23/1985Laimbeer1/2/1985Laimbeer31303135
NAMEDATETMOPPPTSREBMINASTSTLBLKTOVFGMFGAFG%3PM3PA3P%FTMFTAFT%PF+/-
Bill LaimbeerBill Laimbeer1/26/1990DETDETvsPHXPHX3123411040101471.45862.56875.05
Bill LaimbeerBill Laimbeer2/11/1987DETDET@PHIPHI3020461304141973.7010.022100.05
Bill LaimbeerBill Laimbeer2/23/1985DETDETvsNJNNJN3121460201122744.4020.07887.54
Bill LaimbeerBill Laimbeer1/2/1985DETDETvsCLECLE3521412113142263.6010.07977.83
Results may be incomplete. StatMuse has complete game-level data for rebounds going back to the 1982-83 season.