by time for riders under 23 is awarded the White Jersey. Before 2009, this jersey was silver and blue. Best Young Rider Winners Most Days in Youth Jersey , 16 days (2009: 8; 2008: 5; 2007: 3) , 14 days (2014: 7; 2013: 7) , 13 days (2012: 4; 2011: 2; 2010: 7) , 7 days (2018) , 6 days (2006) , 6 days (2015) , 6 days (2016) , 6 days (2019) , 5 days (2017) , 4 days (2011) , 3 days (2007) Teams Classification Teams are classified based on the total time of the team's top three finishers in each stage. Best Team Winners Most Courageous Rider Classification The Blue Jersey is given to the most courageous rider at the end of each stage. In 2008, the jersey was red. George Hincapie has won this jersey three times, after stages in 2008, 2009 and 2010. Jan Bárta won the award twice during the 2011 edition. Ben Wolfe and Evan Huffman both won the jersey twice during the 2017 race. No one else has won this jersey more than once. Doping controversy The main sponsor of the event, Amgen, is the producer of the medical drug Erythropoietin, also called EPO. EPO has been used as a performance-enhancing drug by professional cyclists. Former professional cyclists who admitted their doping, such as Tyler Hamilton, claim that for some time most of the world's top cyclists used EPO. A plan to perform comprehensive anti-doping tests for the 2011 event was terminated by the UCI. The plan was to do blood tests performed by the United States Anti-Doping Agency (USADA), which would have been able to detect EPO, but the UCI and the USADA couldn't agree on the details of the doping tests. For the 2013 edition, the UCI elected to reintroduce testing based on the biological passport, as USADA would also take care of pre-race testing, but with no cooperation between the two agencies. References External links Tour of California, live coverage, videos and photos: Cyclingfans.com 2006 establishments in California Cycle races in the United States Recurring sporting events established in 2006 UCI America Tour races UCI World Tour races Spring (season) events in the United States