LONDON -- Oscar Pistorius never even got the baton.

The double-amputee runner from South Africa was on the track but didn't get to run in the 4x400-meter relay at the London Olympics because a teammate tumbled out in the first heat Thursday morning before reaching Pistorius for the changeover.

Pistorius stood on the track waiting to run third in the relay but Ofentse Mogawane collided with Kenyan runner Vincent Kilu about 90 meters from the finish of the second section and fell.

Pistorius waited to see if his teammate would continue before walking off and watching the rest of the race from beside the finish line.

It was an anguished finish for the man known as the "Blade Runner," who became the first amputee runner to compete in Olympic track and field competition when he ran in the individual 400 earlier in the week. He reached the semifinals in that event but finished last in his heat.

South Africa won a silver medal in the relay last year at the world championships in South Korea, where Pistorius ran in the heats but not in the final. The South Africans were again considered medal contenders at the London Games.

After a long battle for inclusion in able-bodied competition in the individual events, Pistorius won another moral victory last week when the IAAF announced he could run any part of the 4x400 relay in London.

Pistorius was the leadoff runner in the semifinals of the relay last year at the world championships in South Korea after the IAAF had raised concerns that his carbon-fiber blades would endanger others in the race.

The federation said it never restricted Pistorius to the first segment but merely advised that his blades could imperil other runners if he were running in a pack.

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  • South Africa's Oscar Pistorius walks with teammate Lj van Zyl after the men's 4x400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Martin Meissner)

  • South Africa's Oscar Pistorius runs during the men's 4x400-meter during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Lee Jin-man)

  • South Africa's Oscar Pistorius takes the baton from teammate L J van Zyl during the men's 4x400-meter during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Slocum)

  • South Africa's Oscar Pistorius, left, and his fellow team members react following the men's 4x400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

  • Venezuela's Omart Longart, left, and South Africa's Oscar Pistorius, center, wait for the batons during the men's 4x400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

  • From left, Britain's Martyn Rooney, Belgium's Michael Bultheel, Russia's Pavel Trenikhin, Venezuela's Omart Longart and South Africa's Oscar Pistorius wait for the batons during the men's 4x400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Matt Dunham)

  • South Africa's Oscar Pistorius, right, and Omar Longart of Venezuela wait for the baton in the men's 4x400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/David J. Phillip )

  • South Africa's Oscar Pistorius, right, waits for the baton in the men's 4x400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/David J. Phillip)

  • South Africa's Oscar Pistorius competes in the men's 4x400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012. (AP Photo/Hassan Ammar)

  • South Africa's Oscar Pistorius reacts after fellow team members crashed out of a men's 4x400-meter relay heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Thursday, Aug. 9, 2012. (AP Photo/Matt Dunham)

  • South Africa's Oscar Pistorius reacts after fellow team members crashed out of a men's 4x400-meter relay heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Thursday, Aug. 9, 2012. (AP Photo/Matt Dunham)

  • South Africa's Oscar Pistorius reacts after fellow team members crashed out of a men's 4x400-meter relay heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Thursday, Aug. 9, 2012. (AP Photo/Matt Dunham)

  • South Africa's Oscar Pistorius prepares to run in his men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius starts in the men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius runs in one of the men's 400-meter semifinal races during the athletics competition in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Lee Jin-man)

  • South Africa's Oscar Pistorius competes in the 400-meter semifinals heat during the athletics competition in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Matt Slocum)

  • South Africa's Oscar Pistorius starts in a men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Sergey Ponomarev)

  • South Africa's Oscar Pistorius run in the men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Martin Meissner)

  • South Africa's Oscar Pistorius reacts after running in the men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius waves after running in the men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius reacts after his run in the men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius embraces Grenada's Kirani James after the men's 400-meter semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius starts in one of the men's 400 meter semifinal races during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Mark Duncan)

  • South Africa's Oscar Pistorius competes in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012.(AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius reacts after competing in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012.(AP Photo/Martin Meissner)

  • South Africa's Oscar Pistorius starts in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012.(AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius prepares to compete in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012.(AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius prepares to compete in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/David J. Phillip)

  • Dominican Republic's Luguelin Santos, right, and South Africa's Oscar Pistorius compete in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/David J. Phillip)

  • South Africa's Oscar Pistorius and fellow athletes walk off the track following a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/David J. Phillip )

  • South Africa's Oscar Pistorius, left, and Jamaica's Rusheen McDonald compete in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/David J. Phillip )

  • South Africa's Oscar Pistorius, left, and Jamaica's Rusheen McDonald compete in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/David J. Phillip )

  • South Africa's Oscar Pistorius, center, runs with Jamaica's Rusheen McDonald, left, Dominican Republic's Luguelin Santos, second left and Russia's Maksim Dyldin, right, in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012.(AP Photo/Martin Meissner)

  • South Africa's Oscar Pistorius prepares to start in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012.(AP Photo/Martin Meissner)

  • South Africa's Oscar Pistorius reacts after finishing first in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/Martin Meissner)

  • South Africa's Oscar Pistorius reacts after competing in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/Anja Niedringhaus)

  • South Africa's Oscar Pistorius prepares to compete in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/David J. Phillip)

  • South Africa's Oscar Pistorius starts in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/David J. Phillip)

  • From right, Dominican Republic's Luguelin Santos, South Africa's Oscar Pistorius, Russia's Maksim Dyldin and Jamaica's Rusheen McDonald compete in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/Mark Duncan)