Coming off a rare loss at 100 meters, Olympic and world champion Usain Bolt is cutting his season short, saying he won't race again in 2010 because of tightness in his lower back.
Usain Bolt will have treatment to loosen his back and then rest, skipping IAAF Diamond League track and field meets in Zurich on Aug. 19, and in Brussels on Aug. 27.
Bolt hadn't lost an individual race in two years until Friday, when Tyson Gay of the United States beat him at the DN Galan meet in Stockholm. Gay ran 9.84 seconds, and Bolt finished in 9.97