Has an AFL game ever ended 109-91?
It has. 109-91 has been a AFL final 4 times in 16,622 games. The first was Essendon beat Geelong on August 18, 1945; the latest was Carlton beat Port Adelaide on May 19, 2013.
That makes 109-91 the 947th most common final score out of 6,607 that have ever occurred in AFL. One point away, 110-91 has happened 5 times and 109-92 has happened 2 times. At one point the score disappeared for 53 years, between 1945 and 1998.