This is a link from an article written last year about Mouncey and other TIMs involved in women's sports.
gendertrender.wordpress.com/category/sports/?iframe=true&preview=true%2Ffeed%2F
It includes this paragraph...
Callum Mouncey, now “Hannah”, saw the potential at succeeding in Footy that he never qualified for as a man among men. By competing against women, he could rise to the top echelon of elite Footy players in the most popular sport in Australia. He abandoned his plans to apply for the female handball team and joined a regional minor league women’s team in Canberra, announcing his intention to prepare for the first major league women’s draft. Unsurprisingly, at six-foot-two and 220 pounds of male musculature, Hannah displaced a female athlete, and under direction of the team’s male coach played as the team “Rucker”.
and this one..
Australian Football is not, as has been widely misreported, a form of soccer. It is a full contact, full body, tackle sport played with an oval ball similar to an American football. The ball is bounced, kicked and carried, and features repeated “toss ups” where the biggest, tallest players (called “Ruckers”) engage in one-on-one combat for control of the ball.