She was captain of the American rowing team at the 1976 Summer Olympics winning the bronze medal in women's eight.
In 1986, the International Olympic Committee (IOC) appointed DeFrantz to lifetime membership in the organization. She became the first female vice-president of the IOC executive committee in 1997.
On June 25th 2012, DeFrantz told AroundTheRings.com that she would like to return to the IOC Executive Committee after having served on it from 1997-2001.  She was elected back onto the IOC Executive Board on 10 September 2013. 
- Around The Rings: U.S. IOC Member Declares for Executive Board
- IOC Session votes on Executive Board positions
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