Has an AFL game ever ended 50-45?
It has. 50-45 has been a AFL final 3 times in 17,053 games. The first was Carlton beat Sydney on September 21, 1907; the latest was Geelong beat Collingwood on May 8, 1965.
That makes 50-45 the 1599th most common final score out of 6,649 that have ever occurred in AFL. One point away, 51-45 has happened never and 50-46 has happened 1 times. At one point the score disappeared for 45 years, between 1907 and 1952.