David Zabriskie is a retired professional road bicycle racer from the United States, who competed as a professional between 1999 and 2013. His main strength is individual time trials and his career highlights include stage wins in all three Grand Tour stage races and winning the US National Time Trial Championship seven times. Zabriskie is known for his quirky nature, including singing before stages and the interviews he does with fellow riders in the professional peloton which are posted on his web site. In the yellow jersey at the 2005 Tour de France after stages 1–3 — 3 stages, July 2 to July 4. Wiki link