Matty Simmons was NOT the majority owner of the San Francisco Warriors of the NBA in the 1960s, but possibly simply a shareholder or minority owner. The majority/controlling owner was Franklin Mieuli, who owned the team from 1964 to 1986.
He wrote seven books. His last one, Fat, Drunk, and Stupid: The Making of Animal House, was published by St. Martins Press in 2012.
He was the son of Kate (Shapiro), a homemaker, and Irving Simmons, a sign painter. His father was born in Pennsylvania and his mother was born in New York, and all of his grandparents were Russian Jewish immigrants.