I said it half in jest before. But the more I think about it, the more I think it might not be a joke. Maybe Kuroda really did hit Ryan on purpose and the reason really was that Jack refused to deal him to the Yankees (according to Jon Heyman, he did turn down a trade offer for Ryan). I mean, consider the chain of events. Z bails on the Lee deal and says it's because the Yankees' second base prospect has an injured ankle. Without Lee, the Yankees get knocked out of the postseason. Then he deals them Pineda and Campos, both of whom end up on the DL.
Maybe the word went down: They don't want to deal us their shortstop when they're going nowhere and we're in a pennant race? Put him on the DL.