John Jansen was an Australian rugby league player of the 1970s and 1980s. Originally from Corrimal, New South Wales, John 'JJ' Jansen came to the St George Dragons in 1976, as a 22 year old. He had an immediate impact in the lower grades and cemented a first grade position in the second-row along side Robert Stone and blossomed under the guidance of master coach Harry Bath. Jansen won a premiership with St George Dragons in 1977, he played in the drawn 1977 Grand Final and scored a marvelous try in the 1977 Grand Final replay. He would have been picked in the 1979 Grand Final squad if a chronic knee injury hadn't ruined his season. 1983 was his last season, and due to a season ending injury to Craig Young, John Jansen captained the Dragons to the semi-finals. He later coached the lower grades at St George Dragons and the Illawarra Steelers. Rugby League legend and Immortal, Johnny Raper stated in the Big League Magazine on 17th September 1977 about John Jansen and Robert Stone that "They are potentially the best pair of second rowers St. George have ever had."