Has an AFL game ever ended 149-45?
Exactly once. On August 11, 1979, Carlton beat St Kilda 149-45, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 149-45 in league history.
That makes 149-45 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 150-45 has happened never and 149-46 has happened never.