John Collard Cocker (1815 – 27 March 1885), known as Joe Cocker, was an English cricketer who played a single first-class cricket match for a Kent XI in 1842. He was a key figure in the development of cricket in South Australia after emigrating to the colony in the 1840s and was the curator of the grounds that became Adelaide Oval. He was followed by the first curator of the Adelaide Oval George Gooden.