Pirates to promote Konnor Griffin, MLB’s top-rated prospect, to major leagues - Pittsburgh Post-Gazette

Pirates to promote Konnor Griffin, MLB’s top-rated prospect, to major leagues  Pittsburgh Post-GazetteSources: Pirates, Konnor Griffin holding contract negotiations  ESPNPirates To Promote Konnor Griffin  MLB Trade RumorsThe Pirates are calling up teenager Konnor Griffin ahead of Friday's home opener, AP source says  10TVPirates promote Konnor Griffin, one of baseball’s most exciting prospects in years  The New York Times