John Greening (born 25 December 1950 in Burnie) is a former Australian rules footballer who played with Collingwood in the VFL. Greening attended Montello Primary School and Parklands High as he grew up in the industrial town of Burnie in northern Tasmania. Recruited by Collingwood Football Club, Greening moved to Victoria in 1967 aged 16, and attended Northcote High School. He made his senior debut for the club the following year in a game against Hawthorn and became a regular in the side, playing as a ruck rover, half forward, centreman and wingman. He played 94 consecutive games with the club until a major injury on 8 July 1972 during a game against St Kilda. His next game with Collingwood was to be two years later, a match against Richmond. Such was his impact by 1972 that he finished the 1972 season with a 7th placing in the Brownlow Medal, despite only playing 14 games – an average of one vote per game, if the last 'injury game' is included in the calculation. In the Magpie's round 14 (8 July) encounter with St Kilda he had suffered severe cerebral concussion as a result of a hit received during the game. The incident took place after Greening had taken the first mark of the game, he kicked the ball towards Peter McKenna in the goal square and was floored afterwards by St Kilda player Jim O'Dea. Greening, who was comatose for 24 hours and didn't regain full consciousness for several days, was considered lucky not to die or at least be permanently disabled. "Whatever happened – and I didn't see it – I think part of what did happen is he hit the ground and his head hit the cricket pitch... I looked down at Johnny and it gave me a dreadful fright. It was a horrific sight... he was severely hurt." Thompson and fellow Magpies were distraught, some thought Greening would die. "St Kilda's Jim O'Dea received a 10-match suspension for the incident, but Peter McKenna recalls that the initial fear as Greening's teammates ran towards their prostrate young wingman was that they would find him dead." Greening rarely spoke of the incident, "It is not a pleasant anniversary for me... I was about 14 days in a coma... I went through pretty depressive times and still do... It only takes one act of stupidity or violence... and that is