The Miami Marlins’ Don Mattingly has been named the National League Manager of the Year, for Major League Baseball/MLB, in 2020….. Mattingly played here in Greensboro, with the Greensboro Hornets in 1980, as a 19-year-old and hit .358 and was named South Atlantic League Player of the Year. He played more in the outfield than at first base. That was a good Hornets team, but it was the next season that they started their 3-year run of SAL championships. When Don Mattingly made it up the ladder to the New York Yankees, he became an outstanding first baseman, and became…