| Frank Butterworth | |
| Birth Date: | 21 September 1870 |
| Birth Place: | Warren County, Ohio, U.S. |
| Death Place: | Hamden, Connecticut, U.S. |
| Player Years1: | 1892–1894 |
| Player Team1: | Yale |
| Player Positions: | Fullback, halfback |
| Coach Years1: | 1895–1896 |
| Coach Team1: | California |
| Coach Years2: | 1897–1898 |
| Coach Team2: | Yale |
| Overall Record: | 27–5–5 |
| Championships: | 1 national (1897) |
| Awards: |
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Frank Seiler Butterworth Sr. (September 21, 1870 - August 21, 1950)[1] was an American football player and coach. Butterworth attended Yale University, where he was a fullback on Yale's football teams and a member of the Skull and Bones society. He was famously enucleated by Bert Waters during "The Bloodbath in Hampden Park". He was selected as an All-American in 1893 and 1894. Butterworth was also a track star and boxer at Yale.[2] After his college career was over, Butterworth coached football at the University of California, Berkeley (1895–1896) and Yale (1897–1898).[3] The 1897 Yale football team coached by Butterworth went undefeated with two ties, against Army and Harvard.[2]
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.[1] Butterworth died in his sleep at age 79 in Connecticut.