Has an AFL game ever ended 75-50?
Yes. AFL has seen a final score of 75-50 3 times. It first happened on June 16, 1923, when Collingwood beat Carlton, and most recently on July 8, 1989, when Richmond beat Sydney.
That makes 75-50 the 1534th most common final score out of 6,607 that have ever occurred in AFL. One point away, 76-50 has happened never and 75-51 has happened 5 times. At one point the score disappeared for 44 years, between 1945 and 1989.