That's a good point. Was Ervin's positive from a random test, or from a test that all players take at the start of Spring Training? For a free agent, they'd have to be clean for three weeks before they sign a deal - - not knowing when they will get an offer, would they risk taking something and letting the market pass them by? I suppose someone as established as Santana could wait and cycle through several rounds of whatever drug he wanted, just hoping that the random off-season tests don't catch him; then pick a date a month in the future so he can stop using in time to pass a test. I think a lot of players wouldn't have the luxury of time to wait... I suppose they could sign early and use after they sign the contract.