Sally won gold in the 100m hurdles at the 2012 London Olympics, four years after winning silver in Beijing. Laying claim to the Australian record of 12.28, Sally was the 2011 world champion in the 110m hurdles and the IAAF World Athlete of the Year. Sally competed in Moscow at the 2013 IAAF World Championships despite a limited preparation due to injury. She came 2nd and won the silver medal, running a season best time of 12.50.
Sally started athletics seriously after moving to Queensland from Sydney, where she had participated successfully in swimming and gymnastics.Her idols include Catherine Freeman, Melinda Gainsford-Taylor and actress Julia Roberts.Sally changed her surname from McLellan to Pearson following her marriage to Kieran Pearson in early 2010.