Has an AFL game ever ended 63-51?
Yes. AFL has seen a final score of 63-51 7 times. It first happened on June 24, 1899, when Fitzroy beat Essendon, and most recently on June 25, 1977, when Essendon beat Sydney.
That makes 63-51 the 191st most common final score out of 6,607 that have ever occurred in AFL. One point away, 64-51 has happened 5 times and 63-52 has happened never. At one point the score disappeared for 27 years, between 1933 and 1960.