Eaton then worked as the director of player personnel for the Green Bay Packers of the National Football League (NFL).
He graduated from Black Hills State Teachers College where he played end and became captain of the team in his junior year.
He then coached football at Dupree High School for several years leading up to his service in World War II.
Following the war, he returned to coaching at Bennett County High School in Martin, South Dakota, and then earned a master's degree at the University of Michigan.
He began doctoral studies at Indiana University Bloomington, then moved on to coach football at Alma College in Michigan.
Eaton was a detail-oriented disciplinarian who made a name for himself by introducing new techniques that helped smaller defensive linemen.
"[Smaller defensive linemen] became very popular as a result," recalled Paul Roach, Eaton's assistant at Wyoming.
[5][6] The "Black 14" incident spurred the court case Williams v. Eaton, with the issue of free speech against the principle of separation of church and state.
[7] In 1972, Eaton became the director of player personnel for the Green Bay Packers of the National Football League (NFL).
He later served as the western regional director for the BLESTO player rating service of the NFL, before retiring in the mid-1980s.