Daniel Waldo Knowlton, Jr. (April 7, 1881 – March 5, 1969) was an American football player.
During World War I, he served in United States Army's 148th Field Artillery Regiment.
Following his wartime service, Knowlton accepted a job with the Interstate Commerce Commission (ICC).
[2] From 1928 to 1952, he was the chief legal counsel to the Interstate Commerce Commission in Washington, D.C.
In his later years, he lived in Bristol, Rhode Island.