LONDON — The loudest roar of these world track and field championships came on Saturday night as Usain Bolt lay face down on the track and in great pain.
After taking the baton from his teammate Yohan Blake to run the anchor leg of Jamaica’s 4-x-100-meter men’s relay, Bolt began to gather speed only to pull up and shout in pain from what appeared to be a left leg injury about 60 meters from the finish line.
It was hardly the farewell party that Bolt, the greatest sprinter in history, had in mind when he decided to make this meet the last of his career.