Has an AFL game ever ended 90-50?
It has. 90-50 has been a AFL final 3 times in 16,622 games. The first was Richmond beat Geelong on June 6, 1936; the latest was Footscray beat St Kilda on May 27, 2017.
That makes 90-50 the 1534th most common final score out of 6,607 that have ever occurred in AFL. One point away, 91-50 has happened 4 times and 90-51 has happened 2 times. At one point the score disappeared for 78 years, between 1936 and 2014.