Has an AFL game ever ended 137-30?
Exactly once. On May 27, 1939, Melbourne beat Sydney 137-30, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 137-30 in league history.
That makes 137-30 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 138-30 has happened never and 137-31 has happened never.