MLB.com's Jon Morosi reports that Yonder Alonso has been the source of "ongoing trade discussions" between the Yankees and A's. No deal appears imminent, but these things can come together quickly.
Various outlets have opined that a package deal sending Sonny Gray and Alonso to the Yankees makes sense for both sides. The Yankees certainly have the farm system to make the deal happen. While Alonso is a cheap rental, Gray is under team control through 2019 and would likely push the prospect return beyond that which the A's received in the Rich Hill/Josh Reddick trade.