Sheff should be the key to the trade, then multiple lower level high ceiling prospects. I just do not see the Yanks giving up either Andujar or Frazier seeing they are both looked at as potential keys to their year. Just remember a contender is usually not going send more than one MLB ready prospect in most cases. Most will be at least a year away. Getting Sheff would be a big get along with multiple lower level high ceiling prospects. I would say the Dodgers may be a better destination for higher level prospects, but do not see them trading for a pitcher until Machado has been traded, as they have to be working behind the scenes to get him to replace the injured Seager.
"Always look on the bright side of life!"
Eric Idle