Has an AFL game ever ended 91-89?
Yes. AFL has seen a final score of 91-89 4 times. It first happened on July 7, 1928, when Footscray beat Sydney, and most recently on April 6, 2003, when Hawthorn beat West Coast.
That makes 91-89 the 947th most common final score out of 6,607 that have ever occurred in AFL. One point away, 92-89 has happened 4 times and 91-90 has happened 6 times. At one point the score disappeared for 45 years, between 1952 and 1997.