The Kansas City Royals have usually been bad for the past, oh, three, four decades for a litany of reasons, but one consistent contributing reason has been that they just don’t know when to say goodbye to a player in service of the greater good. David DeJesus. Joakim Soria. Danny Duffy. Kelvin Herrera. Whit Merrifield. Scott Barlow. All those players were true premium trade pieces at one point, but the Royals didn’t pull the trigger on leveraging any of them until after their value tanked.