David Oliver (5) leads Terrence Trammell (3) in the men's 110m hurdles qualifying round at the U.S. Olympic athletics trials in Eugene, Oregon June 29, 2012. REUTERS/Steve Dipaola (UNITED STATES - Tags: SPORT ATHLETICS OLYMPICS) 

Terrence Trammell of the U.S. reacts after winning the 50 meters hurdles at the US Open Track and Field meet at Madison Square Garden in New York, January 28, 2012. REUTERS/Ray Stubblebine (UNITED STATES - Tags: SPORT ATHLETICS) 

Terrence Trammell of the U.S. reacts after winning the 50 meters hurdles at the US Open Track and Field meet at Madison Square Garden in New York, January 28, 2012. REUTERS/Ray Stubblebine (UNITED STATES - Tags: SPORT ATHLETICS) 

Terrence Trammell clears the final hurdle ahead of Aries Merritt (L) and David Oliver (R) on the way to winning the 50 meter hurdles at the US Open Track and Field meet at Madison Square Garden in New York, January 28, 2012. All the runners are from the U.S. REUTERS/Ray Stubblebine (UNITED STATES - Tags: SPORT ATHLETICS) 

Terrence Trammel (R) of the U.S. and Dayron Robles (6) of Cuba compete in the 110 meters hurdles men's race at the IAAF World Challenge Ostrava Golden Spike meeting in Ostrava May 31, 2011. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: SPORT ATHLETICS) 

Petr Svoboda (L) of Czech Republic and Terrence Trammell of the U.S. compete during the men's 60 meters hurdles event at the IAAF World Indoor Athletics Championships at the Aspire Dome in Doha March 14, 2010. REUTERS/Mohammed Dabbous (QATAR - Tags: SPORT ATHLETICS) 

Petr Svoboda of Czech Republic,Terrence Trammell of the U.S. and Evgeniy Borisov of Russia (L-R) compete during the men's 60 meters hurdles event at the IAAF World Indoor Athletics Championships at the Aspire Dome in Doha March 14, 2010. REUTERS/Mohammed Dabbous (QATAR - Tags: SPORT ATHLETICS) 

Terrence Trammell of the U.S. competes during the men's 60 metres hurdles event at the IAAF World Indoor Athletics Championships at the Aspire Dome in Doha March 14, 2010. REUTERS/Mohammed Dabbous (QATAR - Tags: SPORT ATHLETICS) 

Dayron Robles (L) of Cuba crosses the finish line in front of Terrence Trammell (R) from the U.S. during the men's 60 meters hurdles event at the IAAF World Indoor Athletics Championships at the Aspire Dome in Doha March 14, 2010. REUTERS/Dominic Ebenbichler (QATAR - Tags: SPORT ATHLETICS) 

Terrence Trammell of the U.S. competes in the men's 60 metres hurdle heats at the 2010 IAAF World Indoor Athletics Championships at the Aspire Dome in Doha, March 12, 2010. REUTERS/Fadi Al-Assaad (QATAR - Tags: SPORT ATHLETICS) 

Terrence Trammell of the U.S. competes in the men's 60 metres hurdle heats at the 2010 IAAF World Indoor Athletics Championships at the Aspire Dome in Doha, March 12, 2010. REUTERS/Fadi Al-Assaad (QATAR - Tags: SPORT ATHLETICS) 

Terrence Trammell of the U.S. competes during the men's heptathlon 60 meter hurdles event at the IAAF World Indoor Athletics Championships at the Aspire Dome in Doha March 12, 2010. REUTERS/Dominic Ebenbichler (QATAR - Tags: SPORT ATHLETICS) 

Terrence Trammell of the U.S. (C) leaps a hurdle on his way to winning the men's 60m hurdles at the 103rd Millrose Games at Madison Square Garden in New York January 29, 2010. Ryan Brathwaite of Barbados is at right and Aries Merritt of the U.S. is at left. REUTERS/Mike Segar (UNITED STATES - Tags: SPORT ATHLETICS) 

Trammell Terrence of France (R) runs to win next to Liu Xiang of China during the men's 110m Hurdles at the Shanghai Golden Grand Prix athletics competition September 20, 2009. REUTERS/Aly Song (CHINA SOCIETY SPORT ATHLETICS IMAGES OF THE DAY) 

Trammell Terrence of France (R) runs to win next to Liu Xiang of China (L) during the men's 110m Hurdles at the Shanghai Golden Grand Prix athletics September 20, 2009. REUTERS/Aly Song (CHINA SOCIETY SPORT ATHLETICS) 

Trammell Terrence of France (R) runs to win next to Liu Xiang of China during the men's 110m Hurdles at the Shanghai Golden Grand Prix athletics September 20, 2009. REUTERS/Nir Elias (CHINA SPORT ATHLETICS) 

Terrence Trammell (L) of the U.S. and Ryan Brathwaite of Barbados cross the finish line in the 110 metres hurdles race during the IAAF Golden League athletics meeting at the Letzigrund stadium in Zurich August 28, 2009. REUTERS/Christian Hartmann (SWITZERLAND SPORT ATHLETICS) 

Terrence Trammell of the U.S. (in purple) clears the hurdles during the110 metres hurdles race at the IAAF Golden League athletics meeting at the Letzigrund stadium in Zurich August 28, 2009. REUTERS/Miro Kuzmanovic (SWITZERLAND SPORT ATHLETICS IMAGES OF THE DAY) 

Terrence Trammel (R) of the U.S. passes the baton to compatriot Michael Rogers in the men's 4x100 metres relay heats during the world athletics championships at the Olympic stadium in Berlin, August 21, 2009. REUTERS/Max Rossi (GERMANY) 

Terrence Trammell of the U.S., Ryan Brathwaite of Barbados and David Payne of the U.S. (L-R) display their medals during the awards ceremony for the men's 110 metres hurdles at the world athletics championships at the Olympic stadium in Berlin August 21, 2009. Brathwaite won the gold ahead of Trammell who won silver and Payne who won bronze. REUTERS/Wolfgang Rattay (GERMANY) 

Ryan Brathwaite of Barbados displays his medal during the awards ceremony for the men's 110 metres hurdles at the world athletics championships at the Olympic stadium in Berlin August 21, 2009. Brathwaite won the gold ahead of Terrence Trammell of the U.S.who won silver and David Payne of the U.S. who won bronze. REUTERS/Wolfgang Rattay (GERMANY) 

Ryan Brathwaite (R) of the Barbados edges William Sharman (L) of Britain and Terrence Trammell (C) of the U.S. at the finish line winning the men's 110 meters hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Michael Dalder (GERMANY SPORT ATHLETICS) 

Ryan Brathwaite (R) of the Barbados edges William Sharman (L) of Britain and Terrence Trammell (C) of the U.S. at the finish line winning the men's 110 meters hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Michael Dalder (GERMANY SPORT ATHLETICS) 

Second placed Terrence Trammell (L) and third placed David Payne (R) of the U.S. celebrate after the men's 110 meters hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Kai Pfaffenbach (GERMANY SPORT ATHLETICS) 

Ryan Brathwaite of Barbados cross the finish line in front of Terrence Trammell (L) and David Payne (R) of the U.S. in the men's 110 meters hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Max Rossi (GERMANY SPORT ATHLETICS) 

Ryan Brathwaite (R) of the Barbados clears the final hurdle with William Sharman (L) of Britain and Terrence Trammell (C) of the U.S. winning the men's 110 meters hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Michael Dalder (GERMANY SPORT ATHLETICS) 

Ryan Brathwaite (R) of the Barbados edges William Sharman (L) of Britain and Terrence Trammell (C) of the U.S. at the finish line winning the men's 110 meters hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Michael Dalder (GERMANY SPORT ATHLETICS) 

Terrence Trammell of the U.S. (R) and his compatriot David Payne celebrate after the men's 110 metres hurdles final during the world athletics championships at the Olympic stadium in Berlin August 20, 2009. REUTERS/Phil Noble (GERMANY SPORT ATHLETICS) 

Ryan Brathwaite (2nd R) of the Barbados edges David Payne (R) of the U.S., William Sharman (L) of Britain and Terrence Trammell (2nd L) of the U.S. at the finish line winning the men's 110 meters hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Michael Dalder (GERMANY SPORT ATHLETICS) 

Terrence Trammell of the U.S.,Ryan Brathwaite of Barbados and David Payne of the U.S. (front-back) take hurdles in the men's 110 metres hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Wolfgang Rattay (GERMANY) 

Ryan Brathwaite (C) of Barbados wins ahead of David Payne (R) of the U.S. and Terrence Trammell of the U.S. in the men's 110 metres hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Fabrizio Bensch (GERMANY) 

David Payne (R) of the U.S., Ryan Brathwaite (2R) of Barbados and Terrence Trammell (3R) of the U.S. clear the last hurdles in the men's 110 metres hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Fabrizio Bensch (GERMANY) 

Ryan Brathwaite (C) of Barbados wins ahead of David Payne (R) of the U.S. and Terrence Trammell of the U.S. in the men's 110 metres hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Kai Pfaffenbach (GERMANY) 

Ryan Brathwaite (C) of Barbados wins ahead of David Payne (R) of the U.S. and Terrence Trammell of the U.S. in the men's 110 metres hurdles final during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Kai Pfaffenbach (GERMANY) 

Petr Svoboda of Czech Republic, Ji Wei of China, Paulo Villar of Colombia, Terrence Trammell of the U.S. and Artur Noga of Poland (R-L) compete in the men's 110 metres hurdles semi-final heats during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Max Rossi (GERMANY) 

Terrence Trammell (R) of the U.S. leads Artur Noga (L) of Poland over the final hurdle in their men's 110 meters hurdles semi-final heat during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Michael Dalder (GERMANY SPORT ATHLETICS) 

Terrence Trammell of the U.S. clears a hurdle in the men's 110 metres hurdles semi-final heats during the world athletics championships at the Olympic stadium in Berlin, August 20, 2009. REUTERS/Kai Pfaffenbach (GERMANY) 

Terrence Trammell of the U.S. crosses the finish line in the men's 110 metres hurdles heats during the world athletics championships at the Olympic stadium in Berlin, August 19, 2009. REUTERS/Michael Dalder (GERMANY) 

Terrence Trammell (L) of the U.S. and Gregory Sedoc of the Netherlands clear hurdles in the men's 110 metres hurdles heats during the world athletics championships at the Olympic stadium in Berlin, August 19, 2009. REUTERS/Michael Dalder (GERMANY) 

Terrence Trammell of the U.S. passes the baton to his team mate Mike Rodgers during the men's 4x100m relay race at The International Lausitzer German Meeting in Cottbus August 8, 2009. REUTERS/David W Cerny (GERMANY SPORT ATHLETICS) 

Terrence Trammell of the U.S. (R) competes during the men's 4x100m relay race at The International Lausitzer German Meeting in Cottbus August 8, 2009. REUTERS/David W Cerny (GERMANY SPORT ATHLETICS) 

Terrence Trammell of the U.S. concentrates before the men's 4x100m relay race during The International Lausitzer German Meeting in Cottbus August 8, 2009. REUTERS/David W Cerny (GERMANY SPORT ATHLETICS) 

Terrence Trammell (C) of the United States races to the finish line as his compatriots Anton Hicks and David Payne (R) trail behind during the Men's 110m Hurdles event at the Reebok Grand Prix athletics meet in New York May 30, 2009. REUTERS/Shannon Stapleton (UNITED STATES SPORT ATHLETICS) 

Terrence Trammell of the U.S. reacts after pulling up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Gary Hershorn (CHINA)

Terrence Trammell of the U.S. reacts after pulling up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/David Gray (CHINA)

Terrence Trammell of the U.S. reacts after pulling up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Gary Hershorn (CHINA)

Terrence Trammell of the U.S. reacts during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Kim Kyung-Hoon (CHINA) 

Terrence Trammell of the U.S. pulls up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/David Gray (CHINA) 

Terrence Trammell of the U.S. pulls up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/David Gray (CHINA)

Terrence Trammell of the U.S. is attended to by officials after pulling up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Dylan Martinez (CHINA) 

Terrence Trammell of the U.S. pulls up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Gary Hershorn (CHINA)

Terrence Trammell of the U.S. pulls up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Gary Hershorn (CHINA)

Terrence Trammell of the U.S. falls to the ground during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Mike Blake (CHINA) 

Terrence Trammell of the U.S. is assisted by officials after pulling up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Mike Blake (CHINA)

Terrence Trammell of the U.S. is assisted by officials after pulling up short during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Mike Blake (CHINA) 

Terrence Trammell of the U.S. grimaces in pain during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Ruben Sprich (CHINA)

Terrence Trammell of the U.S. falls to the ground during his men's 110m hurdles heat of the athletics competition in the National Stadium at the Beijing 2008 Olympic Games August 18, 2008. REUTERS/Mike Blake (CHINA)

Hurdler Terrence Trammell (L) laughs with coach Harvey Glance at a training session for the Beijing 2008 Olympic Games, August 10, 2008. REUTERS/Danny Moloshok (CHINA) 

Hurdler Terrence Trammell of the U.S. attends a training session for the Beijing 2008 Olympic Games, August 10, 2008. REUTERS/Danny Moloshok (CHINA) 

Hurdler Terrence Trammell of the U.S. begins to jog with a mask over his nose and mouth at a training session for the Beijing 2008 Olympic Games, August 10, 2008. Trammell uses a mask while training in Beijing and in his home town of Atlanta to protect himself from air pollution. REUTERS/Danny Moloshok (CHINA)