Mark Lyndon Tonelli, whose birth name was Mark Lyndon Leembruggen, is an Australian former backstroke, butterfly, and freestyle swimmer of the 1970s and 1980s, who won a gold in the 4×100-metre medley
The Olympic pool in Montreal, where Tonelli competed in 1976
Australian Prime Minister Malcolm Fraser (pictured) pressured the Australian athletes to boycott the Olympics. Tonelli took a leadership role in fighting for the opposite.
The Quietly Confident Quartet was the self-given name of the Australian men's 4 × 100 metres medley relay swimming team that won the gold medal at the 1980 Summer Olympics in Moscow. The United States
Mark Tonelli
…of the 1970s and 1980s, who won a gold in the 4×100-metre medley relay at the 1980 Moscow Olympics as a makeshift butterfly swimmer in the self-named Quietly Confident Quartet. Tonelli unofficially led the relay team and was an athletes' spokesperson who fought for the right of Australian Olympians to compete in the face of…
The "Quietly Confident Quartet" pictured after the team's win at the 1980 Moscow Olympics: from left, Peter Evans, Neil Brooks, Mark Tonelli, and Mark Kerry.