Brian Cashman doing everything to get a Sonny Gray trade done

STAMFORD, Conn. — In the Yankees’ big picture, Sonny Gray might wind up as part of a solution. Or he might just be a self-correction in and of himself. Either way, Brian Cashman insisted Friday morning the beleaguered right-hander will be traded for a worthwhile return. In between trips rappelling Landmark Square here, Cashman said…