John Brian "Jack" Iverson (27 July 1915 – 23 October 1973) was an Australian cricketer who played in five Tests from 1950 to 1951. 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. 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".