Has an AFL game ever ended 68-37?
Exactly once. On May 15, 1909, Fitzroy beat Richmond 68-37, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 68-37 in league history.
That makes 68-37 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 69-37 has happened 2 times and 68-38 has happened never.