His play between the white lines was not the only place where Rosen left his mark on the game. He spent 14 seasons as a president or general manager for the New York Yankees (1978-1979), Houston Astros (1981-1985) and the San Francisco Giants (1986-1992). Under his guidance, those teams won two pennants and one world championship. Rosen is the only person in Major League Baseball history to win an MVP award as a player and to be recognized as Executive of the Year by The Sporting News (1987).