Has an AFL game ever ended 102-89?
It has. 102-89 has been a AFL final 4 times in 16,622 games. The first was Carlton beat Geelong on May 11, 1957; the latest was Richmond beat Hawthorn on April 8, 2018.
That makes 102-89 the 947th most common final score out of 6,607 that have ever occurred in AFL. One point away, 103-89 has happened 8 times and 102-90 has happened 5 times. At one point the score disappeared for 27 years, between 1957 and 1984.