After displaying his talent for time trials by winning the US National Time Trial Championships (junior and under-23 age categories) and the Grand Prix des Nations (under-23 category), Zabriskie moved on to the U.S. Postal Service team in 2001.
Efter at have vist sit talent for enkeltstarter ved at vinde USA's nationale mesterskaber i disciplinen (junior og U23), og Grand Prix des Nations (U23), flyttede Zabriskie til US Postal-holdet i 2001.