John "Hi" Simmons (August 16, 1905 – January 12, 1995) was the head baseball coach at the University of Missouri from 1937 until 1973.

Simmons' Missouri team won the 1954 College World Series and finished as runners-up in 1952, 1958 and 1964.

Simmons also served as a football assistant coach under Don Faurot.

He died and is buried at Memorial Park Cemetery in Columbia, Missouri.

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