Has an AFL game ever ended 145-55?
Exactly once. On June 27, 1998, Richmond beat Fremantle 145-55, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 145-55 in league history.
That makes 145-55 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 146-55 has happened 1 times and 145-56 has happened 1 times.