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Brett Johnson (born 15 August 1985) is an English semi-professional footballer who played in the Football League for Northampton Town, AFC Wimbledon and Brentford.
Brett Johnson (born 28 October 1981) is a former Australian rules footballer who played in the Australian Football League (AFL) for Hawthorn and Carlton.
Johnson co-wrote the Mad Men episode "The Grown-Ups" with series creator and show runner Matthew Weiner, which went on to be nominated for the WGA award.