Carl Robert Duser (July 22, 1932 – January 5, 2023) was an American Major League Baseball pitcher.

He was employed by the Bethlehem Steel as a sales executive for over 27 years until retiring.

He was an accomplished professional baseball player including pitching for the Kansas City Athletics from 1956 to 1958, when his career was cut short by an unfortunate automobile accident.

He was a Caribbean World Series champion and was inducted into the Baseball Hall of Fame in Pennsylvania.

This biographical article relating to an American baseball pitcher born in the 1930s is a stub.