Has an AFL game ever ended 99-83?
Yes. AFL has seen a final score of 99-83 7 times. It first happened on May 19, 1945, when Sydney beat Footscray, and most recently on August 26, 2017, when Collingwood beat Melbourne.
That makes 99-83 the 191st most common final score out of 6,607 that have ever occurred in AFL. One point away, 100-83 has happened 3 times and 99-84 has happened 5 times. At one point the score disappeared for 39 years, between 1959 and 1998.