An Australia national and Queensland state representative back-row forward,[4] he played his club career in Brisbane with Souths[5] and in Sydney with Parramatta.
[citation needed] After a successful career as a Queensland and then Australian international representative, in the 1954 pre-season Crocker signed a then-record one-season deal for an Australian to move south and play for Sydney club Parramatta in order to assist his family who had lost their home in a fire the previous year.
In the postseason Crocker was selected for the Australian national team's campaign for the 1954 Rugby League World Cup tournament, the first ever, which was held in France.
Crocker didn't play in the Kangaroos' first match which was lost to Great Britain, but was selected as a second-row forward for the second match against New Zealand which Australia won.
He played in the third match against France which the Australians lost, meaning they would fail to reach the final.