Has an AFL game ever ended 103-51?
It has. 103-51 has been a AFL final 4 times in 16,622 games. The first was Hawthorn beat Sydney on July 11, 1964; the latest was Carlton beat Footscray on July 12, 2020.
That makes 103-51 the 947th most common final score out of 6,607 that have ever occurred in AFL. One point away, 104-51 has happened 2 times and 103-52 has happened never. At one point the score disappeared for 50 years, between 1965 and 2015.