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Rivera is now basically a 95 OPS guy, upside.
Drew has value, but it will cost to see it. A's released him (or bought him out to the tune of $1.5M) because his contract called for $10M next year. Let's assume he's a $5-$7M guy then. With Franklin banging on the Safeco door, We don't need to throw that chunk of cash at Drew. He was a nice player froom '08 to '10 (2.7, 2.7, 3.7 WAR), and could be a nice piece at the right cost. But he would come as a backup, so pay accordingly.
moe