Getty Images 5 months ago

US Walter Dix competes in the men's 100m during the 41th IAAF Grand Prix Meeting at the Raul Guidobaldi Stadium in Rieti on September 10, 2011.

AP Photo 5 months ago

Walter Dix, of the United States, reacts after winning the men's 100 meters at the IAAF Grand Prix in Rieti, Italy, Saturday, Sept. 10, 2011. Dix won the race in 10.02.

Reuters Pictures 5 months ago

Asafa Powell of Jamaica, Walter Dix of the U.S. and Yohan Blake (L-R) of Jamaica compete in the men's 100 metres event at the IAAF Diamond League athletics meeting at Letzigrund stadium in Zurich September 8, 2011.

Getty Images 5 months ago

Jamaica's Yohan Blake (R) runs during the men's 100m race ahead of country fellow Asafa Powell (L) and USA's Walter Dix (C) at the Diamond League series Weltklasse athletics meeting, on September 8, 2011, in Zurich. Blake won the race.

Getty Images 5 months ago

Jamaica's Yohan Blake (R) wins the Men's 100 Metres ahead of US Walter Dix, 3rd at the Diamond League athletics meeting Weltklasse on September 8, 2011 in Zurich.

AP Photo 5 months ago

Yohan Blake, from Jamaica wins the men's 100 meter race in front of Asafa Powell, from Jamaica, back left, and Walter Dix, back right, during the IAAF Diamond League athletics meeting in the Letzigrund stadium in Zurich, Switzerland, on Thursday, Sept. 8, 2011.

Getty Images 5 months ago

Jamaica's Usain Bolt (C), France's Christophe Lemaitre (L) and US athlete Walter Dix stand during the award ceremony for the men's 200m event at the International Association of Athletics Federations (IAAF) World Championships in Daegu on September 4, 2011.

AP Photo 5 months ago

USA's Walter Dix walks on the track after fellow team member Darvis Patton dropped the baton during the Men's 4x100 Relay final at the World Athletics Championships in Daegu, South Korea, Sunday, Sept. 4, 2011.

Getty Images 5 months ago

DAEGU, SOUTH KOREA - SEPTEMBER 04: Usain Bolt of Jamaica poses with his gold medal, Walter Dix of the USA his silver and Christophe Lemaitre of France his bronze during the medal ceremony for the men's 200 metres final during day nine of 13th IAAF World Athletics Championships at Daegu...

Getty Images 5 months ago

DAEGU, SOUTH KOREA - SEPTEMBER 04: Usain Bolt of Jamaica celebrates victory and a new world record next to Walter Dix of United States and Kamil Krynski of Poland in the men's 4x100 metres relay final during day nine of 13th IAAF World Athletics Championships at Daegu Stadium on September...

Getty Images 5 months ago

US athlete Darvis Patton (C) is seen to by medics next to US athlete Walter Dix after falling during the men's 4x100 metres at the International Association of Athletics Federations (IAAF) World Championships in Daegu on September 4, 2011.

Getty Images 5 months ago

DAEGU, SOUTH KOREA - SEPTEMBER 02: Usain Bolt of Jamaica gestures prior to the men's 4x100 metres relay final during day nine of 13th IAAF World Athletics Championships at Daegu Stadium on September 4, 2011 in Daegu, South Korea.

Reuters Pictures 5 months ago

Justin Gatlin (L) and Walter Dix of the U.S. react after their men's 4x100 metres relay final at the IAAF World Athletics Championships in Daegu September 4, 2011.

Reuters Pictures 5 months ago

Gold medallist Usain Bolt (C) of Jamaica, silver medallist Walter Dix (L) of the U.S. and bronze medallist Christophe Lemaitre of France pose during the award ceremony for the men's 200 metres final at the IAAF World Athletics Championships in Daegu September 4, 2011.

Reuters Pictures 5 months ago

Usain Bolt of Jamaica (L) takes the baton from Yohan Blake, as Darvis Patton of the U.S. (C) falls before handing the baton to teammate Walter Dix (R), during the men's 4x100 metre relay final at the IAAF World Championships in Daegu September 4, 2011. Jamaica set a new world record...

Getty Images 5 months ago

DAEGU, SOUTH KOREA - SEPTEMBER 03: Walter Dix of the USA celebrates second place in the men's 200 metres final during day eight of 13th IAAF World Athletics Championships at Daegu Stadium on September 3, 2011 in Daegu, South Korea.

Getty Images 5 months ago

DAEGU, SOUTH KOREA - SEPTEMBER 03: Usain Bolt of Jamaica sprints to victory in the men's 200 metres final ahead of Walter Dix of the USA during day eight of 13th IAAF World Athletics Championships at Daegu Stadium on September 3, 2011 in Daegu, South Korea.

AP Photo 5 months ago

Jamaica's Usain Bolt, right, and USA's Walter Dix, left, compete in the Men's 200m final at the World Athletics Championships in Daegu, South Korea, Saturday, Sept. 3, 2011.

Getty Images 5 months ago

France's Christophe Lemaitre (L) finishes third to take bronze behind US athlete Walter Dix (R) who won silver in the men's 200 metres final at the International Association of Athletics Federations (IAAF) World Championships in Daegu on September 3, 2011.

Getty Images 5 months ago

Jamaica's Usain Bolt (R) finishes first ahead of US athlete Walter Dix (C) in the men's 200 metres final at the International Association of Athletics Federations (IAAF) World Championships in Daegu on September 3, 2011.

AP Photo 5 months ago

Jamaica's Usain Bolt, right, crosses the finish line to win ahead of USA's Walter Dix, left, in the Men's 200m final at the World Athletics Championships in Daegu, South Korea, Saturday, Sept. 3, 2011.

Getty Images 5 months ago

(L-R) Jamaica's Nickel Ashmeade, US athlete Walter Dix, Jamaica's Usain Bolt and Brazil's Bruno De Barros compete in the men's 200 metres final at the International Association of Athletics Federations (IAAF) World Championships in Daegu on September 3, 2011. Bolt won gold and Dix won...

Getty Images 5 months ago

DAEGU, SOUTH KOREA - SEPTEMBER 03: Usain Bolt (R) of Jamaica sprints for the finish line to claim gold ahead of Walter Dix (C) of United States and Nickel Ashmeade of Jamaica in the men's 200 metres final during day eight of the 13th IAAF World Athletics Championships at the Daegu Stadium...

Getty Images 5 months ago

US athlete Walter Dix waves after winning silver in the men's 200 metres final at the International Association of Athletics Federations (IAAF) World Championships in Daegu on September 3, 2011.

AP Photo 5 months ago

France's Christophe Lemaitre, left, celebrates winning bronze as he crosses the finish line behind USA's Walter Dix, right, followed by Jamaica's Nickel Ashmeade in the Men's 200m final at the World Athletics Championships in Daegu, South Korea, Saturday, Sept. 3, 2011.