L.D. Warren worked at the New Jersey Courier Post, before joining the Philadelphia Record in 1927. At the Record, Warren drew feature, editorial and sports cartoons. After 20 years with the Philadelphia Record, Warren moved to the Cincinnati Enquirer in 1947. While working as the Enquirer's editorial cartoonist, Warren's work was also syndicated through the McNaught Syndicate (1951–1974). In 1973, Warren officially retired from the Cincinnati Enquirer, but continued to draw a weekly cartoon to the newspaper. He also recommend Jim Borgman as his replacement.