Has an AFL game ever ended 142-17?
Exactly once. On August 30, 1919, Fitzroy beat Melbourne 142-17, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 142-17 in league history.
That makes 142-17 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 143-17 has happened never and 142-18 has happened never.