Arnold Milton Sowell (born April 6, 1935) is a former middle distance runner from the United States, who represented his native country at the 1956 Summer Olympics in Melbourne, Australia.

As a student at the University of Pittsburgh,[3] he became a prize-winning athlete while a member of the Pitt Panthers track and field team,[4][5] taking the NCAA's 880-yard titles in 1954 and 1956.

Sowell's admittance in 1957 to the Fort Benning United States Army Training School as a second lieutenant was viewed as newsworthy at the time.

[18][2] One track coach, Manhattan's George Eastment, described him as the "greatest runner I ever saw";[17] another, Carl Olson, felt he could break the four-minute mile.

[2] During his career, he had a particular rivalry with his fellow countryman and middle-distance runner, Tom Courtney, the two swapping victories and being involved in many memorable duels.