Why is it risky? You're guaranteed to get Kaz Matsui, so you don't draft a SS. Seems reasonable to me. Sure you'll have to use a last round pick on a SS until Kaz plays his 1st game, but big deal.
One drawback about this is that you'll miss out on other players being added because you'll be sent ot the end of the waiver priority list. But Kaz is probably the best player that's going to be available all year anyway.
This is a very good hint for those who draft last in Yahoo drafts.
"Jack, will you call me, if you're able?"
"I've got your phone number written, in the back of my Bible."