Frederick A. Moncewicz of 73 North Quincy St., former state comptroller, died this afternoon in Cardinal Cushing Hospital. He was 65.

     A well-known athlete, he starred at Brockton High School and Boston College as an infielder. He also played semi-pro baseball and was with the Red Sox for a time. He was first named to the post of comptroller by Gov. Maurice J. Tobin in 1946 and served continuously until 1958, when he retired because of his health.

Prior to his post he served as a member of the State Appellate Tax Board for six months, assistant director of the Municipal Survey Committee at City Hall in Boston and organizer and instructor in unemployment security law for the University Extension Service and was a law instructor at Portia Law School.

Funeral arrangements will be announced from the Russell Funeral Home, 165 Belmont St., Brockton.