While serving at naval air station HMAS Albatross as a naval rating in 1953, Dihm was arrested and charged with assault. It was alleged that he assaulted a navy personnel's wife with a block of wood, after breaking into her room. He pleaded guilty and argued that he had been under the influence of benzedrine and couldn't remember the incident. The court found him guilty and he served a short jail sentence.[2]
Dihm played just eight games for St Kilda, all in the 1955 VFL season, but made a name for himself in Queensland football.[3] He was the joint winner of the 1960 Grogan Medal, while playing with Morningside.
The Grogan Medal has been awarded most years since 1927, and every year since 1945, to the best and fairest player in the Queensland Australian Football League and, historically, other high-level Queensland football competitions. It was known as the De Little Medal until 1946.