James Leroy "Lee" Thomas (born February 5, 1936) is an American former Major League Baseball player and front-office executive.
As general manager of the Philadelphia Phillies from 1988 to 1997, Thomas built the Phillies from a below .500 club into the 1993 champions of the National League.
He most recently was special assistant to the executive vice president with the Baltimore Orioles from December 2011 through the end of the 2018 season.