Has an AFL game ever ended 138-71?
Exactly once. On July 8, 2017, St Kilda beat Richmond 138-71, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 138-71 in league history.
That makes 138-71 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 139-71 has happened 4 times and 138-72 has happened 4 times.