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Melky Cabrera's market value probably SHOULD have tanked, knowing now a bit more of the effects of steroids. If there is ANY possibility that tumors on the spine, or degenerative hip problems a la A-Roid are the result of steroid use, teams are going to be MUCH more careful with long-term contracts OR with assuming six-year contracts of a known user.
Screwing with the human growth and healing process is an invitation to cancer or immune system disorders or degenerative disorders. While HGH can have wonderful uses at a place like the Hutch, getting it at a storefront doesn't seem like a behavior that can lead to good long-term health. And teams are going to take care accordingly.