There's also the Bervin Woods (Collingwood 1950) story, and it even tops Fred Phillips in the brevity stakes!: https://forever.collingwoodfc.com.au/players/bervin-woods/Of full time senior coaches (not caretakers), who has the record for the shortest tenure between appointment and leaving the role?
I know of some coaches who did not complete a single season of their coaching tenure at a particular club. Malcolm Blight stepped down as North's playing coach in 1981 midway through the season and 20 years later was sacked as St Kilda's 2001 coach after just 15 games. Neither of Fitzroy's last two coaches in Bernie Quinlan (1995) and Michael Nunan (1996) saw out their seasons at the Lions, and each time caretaker Alan McConnell took over for the rest of the season. There is also the tragic case of the Adelaide Crows' 2015 coach Phil Walsh who died midway through that season.
However, I was wondering if there might have been a first year coach with an even fewer number of games before departure, maybe pre and during World War 1 or around World War 2?