Has an AFL game ever ended 100-57?
Exactly once. On May 27, 2007, Sydney beat Footscray 100-57, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 100-57 in league history.
That makes 100-57 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 101-57 has happened 2 times and 100-58 has happened 7 times.