Has an AFL game ever ended 81-50?
It has. 81-50 has been a AFL final 6 times in 16,622 games. The first was University beat Richmond on July 10, 1909; the latest was Carlton beat Fremantle on June 25, 2022.
That makes 81-50 the 342nd most common final score out of 6,607 that have ever occurred in AFL. One point away, 82-50 has happened 3 times and 81-51 has happened 3 times. At one point the score disappeared for 77 years, between 1943 and 2020.