Yankees have now traded five outfield prospects in last 2 years

Billy McKinney, who joined Brandon Drury in the deal to Toronto that brought the Yankees J.A. Happ, becomes the fifth lefty-hitting outfield prospect the Yanks have traded since August 2016, joining Ben Gamel, Blake Rutherford, Dustin Fowler and Jake Cave. Plus, they let Mason Williams leave as minor league free agent. The Astros addressed a…