 Complete the following phrase:  Sam Griffiths is an Australian Eventing rider from Pearcedale in Victoria. 2017 saw him as the Ambassador to the Mitsubishi Motors Adelaide International Horse Trials. 4th individually at the 2016 Rio de Janeiro Olympic Games and part of the Bronze medal winning team. He won the 2014 Mitsubishi Motors Badminton Horse Trials riding Paulank Brockagh who he later went on to ride in the FEI World Equestrian Games. Winner of the 2014 Event Rider of the Year LAnnée Hippique Awards. At the 2012 Summer Olympics he competed in the 