US rider Chris Horner (RadioShack) celebrates winning as he crosses the finish line on September 2, 2013 after the tenth day of the 68th edition of 'La Vuelta' Tour of Spain, a 186,8km stage between Torredelcampo and Alto de Hazallanas. AFP PHOTO/ JOSE JORDAN
Credit: JOSE JORDAN
Chris Horner (L) riding for Radio Shack-Nissan signs autographs prior to the start of stage seven in the Amgen Tour of California from Ontario to Mt. Baldy on May 19, 2012 in Ontario, California.
Credit: Doug Pensinger
Chris Horner riding for the Airgas - Safeway Cycling Team during stage 3 of the Tour of the Gila on May 1, 2015 in Silver City, New Mexico.
Credit: Jonathan Devich
Chris Horner of the USA and riding for Team Radioshack takes the podium to receive the overall race leaders jersey after he won stage four of the 2011 AMGEN Tour of California from Livermore to San Jose on May 18, 2011 in San Jose, California.