Has an AFL game ever ended 122-82?
Exactly once. On July 28, 1979, Geelong beat Footscray 122-82, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 122-82 in league history.
That makes 122-82 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 123-82 has happened 3 times and 122-83 has happened 4 times.