He remained in that position from 1966 to 1969 and continued thereafter as the supervisor of officials for the American Football Conference from 1970 to 1974 .
In June 1966 , Hein was hired by commissioner Al Davis as the supervisor of officials for the American Football League .
Hein remained in that position from 1966 to 1969 and continued thereafter as the supervisor of officials for the American Football Conference from 1970 to 1974 .
In June 1966 , Hein was hired by commissioner Al Davis as the supervisor of officials for the American Football League .