Tight back shelves Bolt for rest of 2010 (AP)

[ASFN Admin]

Usain Bolt is calling it quits for 2010, cutting his season short because of tightness in his lower back less than a week after losing in the 100 meters to American rival Tyson Gay. Bolt's manager, Ricky Simms, wrote in an e-mail Tuesday that the world record-holder at 100 and 200 meters will have treatment to loosen his back and then rest, skipping IAAF Diamond League track and field meets in...

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