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Of the risks in a lot of his moves. Also on the difference between looking at results vs. talent/ability.
I think Z realizes how volatile talent is, so all you can do is get as many really talented guys as possible and see which ones pan out. At least with the risky moves. Lee, not so risky, you know pretty much what you're likely to get.
That's why all his moves are hedged. If Branyan had been horrible, he had Sweeney for 1B, and Carp in the minors, and Griffey from the left side...