For this year’s trade-deadline class of starting pitchers, you very well could prefer the maybes to the definitelys. That leaves the Yankees, clearly requiring some arms to complete their mission, in the spot of rooting for teams on the bubble to stumble, thereby expanding supply and alleviating demand. But they have to get to work, too, what with Monday’s start of the amateur draft marking a meaningful milepost in this process. Typically teams pivot to trade mode upon the conclusion of the draft, and with baseball changing its rules this season to mandate all swaps must be completed by Jul...