Sport: Chemical Edge: Who's Got It?

Sure, everybody talks about athletes using performance-enhancing drugs, but who does anything about it?

Here's a look at how three professional sports stack up against one another and the Olympics in what is often described as an arms race between athletes looking for a pharmacological advantage and would-be protectors of the integrity of sports trying to ensure a level playing field.

--By David Bjerklie

BASEBALL

TESTING: Notorious for dragging its feet, baseball is finally testing players--but only for steroids

PENALTIES: A first infraction results in treatment. For subsequent failures, players are punished by suspensions ranging from 30 days to two years

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