Blair Evans finished second behind Stephanie Rice in the 400m Individual Medley to secure her maiden berth on the Australian Olympic Team for the 2012 London Olympic Games. Evans finished sixth in her heat of the event in London before swimming in the heat of the 4x200m freestyle. In the relay final Melanie Schlanger, Bronte Barratt, Kylie Palmer and Alicia Coutts combined to win silver.
Evans won her first Australian title in the 800m at the 2009 National Championships and went on to make her senior international debut at the World Championships where she finished 18th. She won gold at the 2010 Commonwealth Games in the 4x200m freestyle relay and won silver in the same event at the 2011 World Championships.