Hm, I haven't seen anything definitive. The reason I ask is because it was a rather popular topic of discussion when Polanco did it last week, and Baldelli was asked about it in the post game and was quite adamant that he did not call for that (Polanco did it on his own) and would never really think of calling for a bunt in that situation (the two situations were exactly the same, 1st and 2nd, 0 out, but maybe an inning earlier this time).