Tyler Hamilton Appeal Decision
The CAS Panel confirmed the lower court’s decision and imposed a two year
suspension on Tyler Hamilton
USADA Press Release- U.S. Cycling Athlete Tyler Hamilton Receives Two-Year
Suspension for Doping
Tyler Hamilton's Blood Doping Violation Unanimously Upheld By CAS.
Colorado Springs, Colo. (February 11, 2006) – The United Sates Anti-Doping
Agency (USADA) announced today the decision of an independent three-member
arbitration panel from the International Court of Arbitration for Sport (CAS),
the highest court for sport. The CAS Panel confirmed the lower court’s decision
and imposed a two year suspension on Tyler Hamilton of Boulder, Colo., one of
the top contenders in the 2004 Tour de France and the gold medal winner in the
time trial at the 2004 Athens Olympic Games, for committing a doping violation.
Following full evidentiary hearings, the CAS Panel unanimously found that Mr.
Hamilton, 34, committed a doping violation for testing positive for transfusing
another person’s blood. The CAS Panel stated, “USADA has met its burden of proof
by demonstrating that the HBT test conducted by the Lausanne Laboratory was in
accordance with the scientific community’s practice and procedures.”
The CAS Panel heard from numerous witnesses which included the independent
expert testimony of one of the world’s top flow cytometrist, Dr. Bruce Davis of
the Maine Medical Center Research Institute, who is also the Chairman of the
Clinical and Laboratory Standards Institute Area Committee in Hematology. Dr.
Davis’ evidence was that “without any equivocation . . . the blood sample from
Tyler Hamilton on September 11, 2004 contained a mixed population . . .
indicat[ing] a previous homologuous blood transfusion.”
In reaching its decision the CAS Panel considered a number of Mr. Hamilton’s
theoretical explanations for the positive test result including a disappearing
twin, unsubstantiated problems with his positive test results and even an
extortion plot by a fan of another team.
“The Panel considered each of the excuses and found each to be completely
without merit,“ said Terry Madden, CEO of USADA. “It is sad that Mr. Hamilton
resorted to conspiracy theories rather than just accept the consequences of his
Madden added, “the development and implementation of this test and the
confirmation of its validity would not have been possible without the dedication
and efforts of the scientific community and the world anti-doping movement.”
A transfusion of another person’s blood is a prohibited method under the USADA
Protocol and the UCI Anti-Doping Rules, which adopt the World Anti-Doping Code
and the World Anti-Doping Agency’s Prohibited List. This form of blood doping
allows a person to increase their red blood cells, thereby increasing their
aerobic power and endurance.
Hamilton tested positive at the Vuelta de Espana on September 11, 2004 and
forfeits all competitive results received from that date. His period of
suspension ends on September 22, 2006, two years from the day the CAS Panel
found he was provisionally suspended.
Union Cycliste Internationale (UCI) initially referred the case to USADA for
handling. UCI joined USADA as a party in the presentation of the case when Mr.
Hamilton appealed the initial arbitration decision.
USA Cycling, the national governing body for the sport in the United States,
will carry out the sanction.
USADA is responsible for managing the testing and results management process for
athletes in the U.S. Olympic and Paralympic Movement. USADA is equally dedicated
to preserving the integrity of sport through research initiatives and
Note: For copies of the CAS decision, visit
Tyler Hamilton will be free to return to racing on September 6, and word is
that his first races will be in Europe, possibly with his last team Phonak,
though this has not been confirmed with the team.