Has an AFL game ever ended 148-38?
Exactly once. On May 29, 2014, Sydney beat Geelong 148-38, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 148-38 in league history.
That makes 148-38 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 149-38 has happened never and 148-39 has happened never.