David Zabriskie (born January 12, 1979 in Salt Lake City) is a professional road bicycle racer from the United States who rides for Team CSC. His main strength is individual time trials and his career highlights include stage wins in all three Grand Tour stage races, as well as the US National Time Trial Championship. 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 homepage.
He became the third American ever to wear the leader's jersey at the 2005 Tour de France, after the three-time Tour winner Greg LeMond, and seven-time winner Lance Armstrong. George Hincapie and Floyd Landis became the fourth and fifth American in 2006. He is considered by some to be the heir-apparent to Armstrong as the greatest American cyclist.