Has an AFL game ever ended 99-66?
It has. 99-66 has been a AFL final 6 times in 16,622 games. The first was Richmond beat Geelong on September 26, 1931; the latest was Adelaide beat St Kilda on July 31, 1999.
That makes 99-66 the 342nd most common final score out of 6,607 that have ever occurred in AFL. One point away, 100-66 has happened 4 times and 99-67 has happened 4 times. At one point the score disappeared for 31 years, between 1958 and 1989.