Resides: Austin, Texas; Aspen, Colo.
Notable: Returned to pro road cycling in 2009 following a 3? year retirement and seven straight Tour de France titles ... Made North American return at the TOC, finishing seventh, 1:46 behind Astana teammate Levi Leipheimer ... Began his 2010 season in January at the Tour Down Under in Australia, placing 25th overall ... Will compete at the TOC this year with fewer racing days than expected the result of stomach illness and increased family time ... While preparing for a eighth Tour de France title chance in July competed at altitude and rode in strong support of the victorious Leipheimer at the Tour of the Gila in New Mexico in April ... Recently announced girlfriend Anna Hansen is pregnant with the couple's second child and Armstrong's fifth.
Team: Quick Step
Notable: Two-time winner of Paris-Roubaix (2005, 2008) and world road title (2005) and one of the sport's best one-day riders ... Won six Tour de France stages and two Tour of Spain stages ... Won opening TOC stage to Sacramento in 2008, but didn't compete in the race last year via the controversy surrounding his multiple out-of-competition positive drugs tests for cocaine in 2008 and 2009 ... Has four wins this season, but none in Classics ... Placed second in Milan San Remo and fifth in Paris-Roubaix.
Resides: Hierden, Netherlands
Notable: One of world's most accomplished track riders in history, completing the "triple" with world titles in the sprint, kilo and keirin ... Now transitioned into the pro road peloton ... Immensely quick speed and known for his "explosive" reactions ... Was involved in the notorious incident when he was accused of causing the crash of the eventual winner Daryl Impey by grabbing Impey's left shoulder with his right hand in the waning meters of a 2009 Tour of Turkey stage. Union Cycliste Internationale (UCI) determined "Bos's behavior undermined the image, reputation and interests of cycling," and suspended him for a month ... Has had successful 2010 with a handful of sprint stage wins.
Resides: Ittigen, Switzerland
Notable: The most current dominant one-day rider in cycling and claimed the elusive Tour of Flanders and Paris Roubaix double this season ... Won 2008 TOC prologue and repeated the win in 2009 ... As race leader and a three-time world time trial titlist, withdrew from 2009 TOC because of illness prior to stage 1 ... Reigning Olympic time trial champion and road race bronze medalist ... Could via for overall TOC title this year.
Resides: Manchester, England
Notable: Brash, moody and generally considered the world's best sprinter, had a remarkable two-season reign in 2008 and 2009 ... Won, among many other races, a combined 10 stages of the Tour de France, including six stage wins last year ... Won opening stage of the Tour of Missouri, his 50th pro road title last September ... Won two stages of the 2009 TOC and will return to California instead of riding in the Tour of Italy, where in the past two years, he's claimed five individual stages and was part of a team time trial winning squad ... Recurring dental issues plagued early 2010 season, prompting media criticism for his lack of wins ... Won second stage of the Tour of Romandie and expressed his frustration with an obscene gesture crossing the line ... Was pulled out of the race by his team in the incident aftermath and later publicly apologized.