Has an AFL game ever ended 91-26?
Exactly once. On June 25, 1904, Melbourne beat St Kilda 91-26, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 91-26 in league history.
That makes 91-26 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 92-26 has happened 2 times and 91-27 has happened 1 times.