The whole thing is dumb. With the posting fee he likely ends up costing around $50M more than the next best SP left on the market. If he goes for 6/100 plus the 20M posting fee, it's probably a smarter move to just sign Garza/Santana/Ubaldo for 5/75.
I like the idea of Tanaka, but the more I think about it, I can see AA pushing hard for one of the other 3 when it's all said and done.