David Epstein covers energy and environment issues as well as
sports science. Prior to joining ProPublica, he was a senior writer at
Sports Illustrated, where he co-authored the 2009 report that Yankees
third baseman Alex Rodriguez had used steroids.
A cache of leaked blood tests showed hundreds of track athletes have recorded results “suggestive of doping.” With the 2015 world track championships about to start, a look at why anti-doping tests are so ineffective.