Career
He played at the tackle position for the Wildcats football team and was a consensus first-team All-American in 1931. He played for three Big Ten Conference championship teams at University, two in football (1930, 1931) and one in basketball (1930-1931). He also served as an assistant football coach at the University of San Francisco.
Marvil was raised in Laurel, Delaware.
He played basketball and was a "weight man" for the track team at Laurel High School. Marvil played college football at the tackle position for University.
In 1930, he helped lead the Wildcats football team to a Big Ten Conference championship and was selected by the Associated Press as a second-team All-Western player. Marvil was six feet, three inches, and weighed 233 pounds while playing football at Despite his size, weighing 254 pounds in December 1929, he reportedly "handle his bulk well" on the basketball court.
The Chicago Daily Tribune in October 1931 commented on Marvil"s weight: "Dal"s chassis is of such a roly poly nature that it is very deceptive to his opponents.
He has proved conclusively that a boy who looks blubbery may have plenty of muscle and sinew concealed about him."
In February 1932, Marvil was hired to serve during the 1933 season as the head line coach for the University of San Francisco football team In April 1933, he became engaged to Dorothy Florence Ames of LaGrange, Illinois, who he met while attending As of 1946, he was the president of the "North Men"s club"
Marvil died in Broward County, Florida, on March 12, 1977 at the age of 66.
