Has an Olympic Basketball (Men) game ever ended 89-66?
Yes. Olympic Basketball (Men) has seen a final score of 89-66 2 times. It first happened on January 1, 1956, when Brazil beat Australia, and most recently on September 3, 1972, when Australia beat Egypt.
That makes 89-66 the 33rd most common final score out of 698 that have ever occurred in Olympic Basketball (Men). One point away, 90-66 has happened never and 89-67 has happened never.