Has an AFL game ever ended 120-28?
Exactly once. On August 8, 1908, Sydney beat Richmond 120-28, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 120-28 in league history.
That makes 120-28 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 121-28 has happened 1 times and 120-29 has happened never.