FOR YEARS,JOCKEY GARY Birzer spent more time trying to snare mounts and win races than worrying about his future.But when he got engaged in 1998,he realized he had better look out for his family,since jockeys have a 60% chance of being injured in any given year.So he joined the Jockeys' Guild,an organization founded in 1940 primarily to take care of the health of jockeys.
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