A climbing specialist, Burrow won the UCI Under-23 World Cup point rankings in 1999 as well as five other victories, establishing himself as a young rider with a promising future.
Burrow is a former junior national time trial champion who comes from a cycling family.
Both of his parents were British time trial champions. 1999 victories included a stage at the International Thuringen Rundfahrt, two stages and the overall at the Ronde de l'Isard and the overall at the Trans-Alsace. On the stage win of the Ronde de l'Isard finishing on the Plateau de Beille, Burrow stormed up the climb, topping Marco Pantani's record set during the 1998 Tour de France. Burrow enters his second year as a professional with the U.S. Postal Service team. Burrow earned his top results in 2000 at the Route du Sud, finishing 17th overall, and the Tour de Region Wallonnes, placing sixth.