Has an AFL game ever ended 44-12?
Exactly once. On June 25, 1898, Sydney beat Carlton 44-12, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 44-12 in league history.
That makes 44-12 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 45-12 has happened never and 44-13 has happened 1 times.