He was known for his unique "bent finger" grip, with which he briefly perplexed batsmen across Australia as well as the touring English cricket team.

[2][3][4] His five Tests were all against England, in the 1950–51 series, but was forced to retire to look after his ailing father's business; he "could have the world's best batsmen at his mercy, if he could spare the time".

Starting in 1933, Iverson became a jackaroo in the Mallee and later rose to become an assistant manager on a property of Essington Lewis at Tallarook.

[2] In 1939, he enlisted in the Australian Defence Force after the outbreak of the Second World War, and served in the anti-aircraft regiments of the Ninth Division in the Middle East, before being deployed to what is now Papua New Guinea.

He rose rapidly, from the third XI at Brighton in late 1946, to the Melbourne Cricket Club in 1948 and the Victorian team a year later.

His unique action perplexed the visiting batsmen to such an extent that in the Test series he obtained 21 wickets for 15.73 runs apiece.

If it pointed directly at the batsmen, it would be a topspinner.His style was praised by one of his contemporaries, fellow Australian leg spinner Richie Benaud and national captain, who stated in reference to Iverson's innovation that changed thinking about spin bowling:[8] There have been plenty of spin bowlers around for more than a hundred years but the four, for me, who have broken the mould and made batsmen think seriously about what was coming down the pitch at them, have been Bernard Bosanquet, Jack Iverson, John Gleeson and Shane Warne.Family commitments and his job in managing a real estate agency resulted in him disappearing from the first class cricket scene in 1951.