As manager Lewis Albert Fonseca (January 21, 1899 – November 26, 1989) was an American professional baseball first baseman, second baseman and manager in Major League Baseball for the Cincinnati Reds, Philadelphia Phillies, Cleveland Indians, and Chicago White Sox.

His success was short-lived, however, as he broke his arm in 1930, and a torn ligament in his leg prematurely ended his playing career.

Fonseca was one of the first to use film in analyzing baseball games and finding flaws in players.

After retiring from playing the game, Fonseca teamed with Charley Grimm to call Chicago White Sox and Chicago Cubs radio broadcasts on station WJJD in 1939 in 1940, then was employed as director of promotions for both major leagues.

Television sportscaster Bob Costas wrote of Fonseca's narration: "[his] vocal stylings were somewhat less than mellifluous, but still endlessly entertaining."