Frank Butterworth

Frank Seiler Butterworth Sr. (September 21, 1870 – August 21, 1950) was an American college football player, coach, and state legislator.

Butterworth, a son of Ohio congressman Benjamin Butterworth, attended Yale University, where he was a fullback on Yale's football teams and a member of the Skull and Bones society. After his college career was over, Butterworth coached football at the University of California, Berkeley (1895–1896) and Yale (1897–1898). The 1897 Yale football team coached by Butterworth went undefeated with two ties, against Army and Harvard.

Butterworth worked for the bankers Bertron & Storrs, was a senior partner with real estate brokers F. S. Butterworth & Company, and was president of the New Haven Hotel Company. He served as a Connecticut State Senator from 1907 to 1909 and was a Second Lieutenant in the Chemical Warfare Service during World War I. Butterworth died in his sleep at age 79 in his home in Mount Carmel, Hamden, Connecticut.

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