Has an AFL game ever ended 137-50?
Exactly once. On August 2, 1986, Essendon beat Hawthorn 137-50, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 137-50 in league history.
That makes 137-50 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 138-50 has happened never and 137-51 has happened never.