Has an AFL game ever ended 142-81?
Exactly once. On May 30, 1931, Geelong beat Fitzroy 142-81, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 142-81 in league history.
That makes 142-81 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 143-81 has happened 2 times and 142-82 has happened never.