Even running back Herschel Walker made it to the Olympics albeit as a member of the 1992 two-man bobsled team.

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U.S.A. Olympic speed skating and bobsled team representatives trailed BMW Team Rahal Letterman over the weekend at the 59th Annual Twelve Hours of Sebring race.

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His sheer bulk -- weighing in at 120 kg as against 94 kg for Bolt -- was always going to be a barrier on the track, and he was persuaded to try a new challenge by Germany's national bobsled team coach Gerd Leopold.

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The Bo-Dyn Bobsled Project refurbished the American team's sleds for two decades, but since the split, few wrenches have been taken to the fleet.

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