I would not take a prospect package for Castro. Any prospect package, I mean. There are just 9 players that project to more WAR than Castro over the next 5 years. Those would be the only players I'd trade Castro for. And even then, I'd balk at the pitchers unless the other team added prospects to the deal. Those players: Evan Longoria, Matt Kemp, Mike Trout, Clayton Kershaw, Troy Tulowitzki, Justin Verlander, Bryce Harper, Giancarlo Stanton and Andrew McCutchen.