Jamaican team doctor says Bolt had a cramp

LONDON

-- Jamaican team doctor Kevin Jones said Usain Bolt had a cramp in his left hamstring.

Bolt grimaced in pain as he was running down the finishing straight before stumbling and falling to the track.

"A lot of the pain is from disappointment from losing the race," Jones said. "The last three weeks have been hard for him, you know. We hope for the best for him."

Bolt failed to make it to the finishing line in his last race.

The Jamaican great crumpled on the track with a left leg injury as he was chasing gold in the 4x100meter relay at the world championships.

Instead, Britain upset the United States to take gold in 37.47 seconds. The Americans were .05 seconds behind. Japan took bronze in 38.04.

Bowie became the first double gold medalist at the world championships, anchoring the U.S. team to the 4x100-meter relay title ahead of Britain and Jamai ca.

At the same time, Allyson Felix, running the second leg on the winning team, earned a record 15th medal at the world championships in a career going back to 2005.

Bowie, who won the 100 meters this week, ran a strong anchor leg, leaving behind the opposition to finish in 41.82 seconds.

Britain took silver in 42.12 and two-time defending champion Jamaica earned bronze in 42.19.

(AP)