Munzel first worked for the Chicago Herald-Examiner part-time in 1922 at age 15.

[2] After graduating from high school in 1925, he attended Northwestern University for two years.

[2] He started working full-time for the Herald-Examiner in 1927, and began covering the Chicago White Sox in 1929.

[2] During his career, he covered 34 World Series and 36 Major League Baseball All-Star Games.

[2] Munzel served as president of the Baseball Writers' Association of America (BBWAA) at one time, and in 1977 was voted the J. G. Taylor Spink Award by the organization.