Who are some former players who had an impressive second career after leaving baseball the diamond? Non-playing roles within baseball are acceptable. (Please consider significant careers. Appearing as a bit actor in a movie or two, or moving into a standard ex-jock post like game announcer or ESPN/MLB Net commentator, is too low a threshold here.)
A few I thought of:
Jim Bunning (Tigers, Phillies, Pirates, Dodgers, 1955-71; HOF 1996) -- United States Representative (Kentucky) 1987-99, United States Senator 1999-2011).
Billy Beane (Mets, Twins, Tigers, Athletics 1984-89) -- Oakland A's general manager, 1997-present.
Chuck Connors (Dodgers, Cubs 1949 & '51) -- actor, lead character in The Rifleman (1958-63).
John Elway (minors, 1982) -- football player, Denver Broncos, 1983-99.
Randy Poffo (minors, 1971-74) -- wrestler/entertainer Randy Savage.
Bobby Brown (Yankees, 1946-52 & '54) -- got medical degree, cardiologist, president of the American League 1984-94.
Scott Boras (minors, 1974-77) -- most successful and most reviled player agent certified by MLBPA.
Danny Ainge (Blue Jays 1979-81) -- basketball player, Boston Celtics, Sacramento Kings, Portland Trail Blazers, Phoenix Suns 1981-85; basketball coach, Phoenix Suns, 1996-99.
Tony Clark (Tigers, Red Sox, Mets, Yankees, Diamondbacks, Padres 1995-2009) -- executive director of the Major League Baseball Players Association, 2013-present. (Still the only MLB player to homer in six different time zones in championship play.)
Who else can you think of, who reached new heights after leaving the diamond?