Referred to as the 'Little Troll' by Lance Armstrong, Walsh along with fellow Irishman and
Sunday Times journalist
Paul Kimmage, led the way in exposing the systematic doping rife within cycling, in particular the
US Postal Team and its leader, Lance Armstrong. Walsh revealed in the
Sunday Times in 2001 after a two-year investigation that Armstrong was working with the controversial Italian doctor
Michele Ferrari. Under the headline "Champ or Cheat?"
The Sunday Times asked in 2001 why a clean rider would work with a dirty doctor. Walsh's books on Armstrong include
L.A. Confidentiel (2003 with
Pierre Ballester), in which Armstrong's
soigneur Emma O'Reilly revealed that she has taken clandestine trips to pick up and drop off what she concluded were doping products;
From Lance to Landis: Inside the American Doping Controversy at the Tour de France; and
Seven Deadly Sins: My Pursuit of Lance Armstrong (2012). Reacting to the confessions Armstrong made in an interview with
Oprah Winfrey, broadcast on 17 and 18 January 2013, Walsh said that ''"the interview was fine in as far as it went, but it did not go nearly far enough, and even in as far as it went I was particularly disappointed that he didn't admit what might be called the hospital room admission from 1996".
Walsh was also disappointed that Armstrong failed to "name names"''. Before Winfrey did the interview, Walsh's
Sunday Times bought a full-page ad in the
Chicago Tribune—Winfrey lives in Chicago—to suggest 10 questions she should ask.
The Sunday Times lost a libel suit over Walsh's coverage and Walsh wrote in a postscript to his 10 questions in
The Tribune: ''"The Sunday Times is seeking to recover about $1.5m (million) it claims he got by fraud. He used Britain's draconian libel laws against us"''. Referring to the battle against doping in cycling sport on a global scale, Walsh said in January 2013 in an interview with Global Cycling Network (GCN) that "cycling needs new leadership" and that
Greg LeMond "could serve as interim
UCI president in an effort to pressure
Pat McQuaid to leave his post". On 29 January 2013, the
World Anti-Doping Agency (WADA) said it is "dismayed" by the way cycling's global governing body has handled the fallout from the Lance Armstrong affair and accused it of being "deceitful" and "arrogant".
John Fahey, the president of WADA concluded that "UCI has again chosen to ignore its responsibility" to cycling. In October 2013, it was announced that his book
Seven Deadly Sins: My Pursuit of Lance Armstrong was to be adapted into a film entitled
The Program, directed by
Stephen Frears and starring
Chris O'Dowd as Walsh and
Ben Foster as Armstrong. The film was released in Autumn 2015.
Awards and nominations ==Controversies==