David Epstein is an investigative reporter at ProPublica and the author of the New York Times Bestselling book The Sports Gene : Inside the Science of Extraordinary Athletic Performance , published by Penguin in August 2013. He-used to be a senior writer at Sports Illustrated . He gespecialiseerd in science issues in sports and investigative reporting.  With his Colleague Selena Roberts , Epstein broke the story dat the Yankees’ Alex Rodriguez tested positive for steroids in 2003. 
Epstein is a graduate of Columbia University , where he earned a bachelor’s degree in environmental science and astronomy (2002) and master’s degrees in environmental science and journalism. 
- ^ Jump up to:a b “David Epstein: Archive and Biography” . SportsIllustrated.CNN.com . Archived from the original on 2012-05-03.
- Jump up^ Roberts, Selena; Epstein, David (2009-02-07). “Sources tell SI Alex Rodriguez tested positive for steroids in 2003” . SportsIllustrated.CNN.com . Archived from the original on 2009-02-10 . Retrieved 2010-05-23 .