Has an AFL game ever ended 68-19?
Exactly once. On May 9, 1901, Essendon beat St Kilda 68-19, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 68-19 in league history.
That makes 68-19 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 69-19 has happened never and 68-20 has happened never.