Robert Creamer is among the most respected and prolific sports writers in the United States. Creamer was one of Sports Illustrated's founding writers and editors in 1954, where he served as senior editor from inception to 1984. He remains at SI as a contributing editor.

The author of several books, his Babe: The Legend Comes to Life in 1974 is considered the definitive biography of Babe Ruth. His Baseball in 1941 is a sociological and historical look at a world in turmoil during baseball's greatest season - 1941 - the year of Joe DiMaggio's 56-game hitting streak and Ted Williams' .406 batting average. His 1984 Stengel: His Life and Times is the definitive biography of the "Old Perfesser."

Creamer ghosted Quality of Courage for Mickey Mantle in 1964, and wrote Jocko with umpire Jocko Conlin in 1967. In 1968, Creamer collaborated with Red Barber on Rhubarb in the Catbird Seat, a biography of the Mississippi broadcaster's Hall of Fame life behind the microphone. He also co-authored The Yankees in 1979.

In recent years, Creamer has been a frequent on-screen contributor to the ESPN series Sports Century commenting on historical moments and people in sports, many of which he covered. He was one of the principal experts in Baseball, the Emmy-winning PBS documentary by Ken Burns.