Has an AFL game ever ended 57-15?
Exactly once. On August 8, 1964, Geelong beat Sydney 57-15, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 57-15 in league history.
That makes 57-15 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 58-15 has happened never and 57-16 has happened 1 times.