He served initially under head coach Dudley DeGroot on the 1947 Dons team .
In March 1947 , Hein was hired as an assistant coach with the Los Angeles Dons of the All - America Football Conference ( AAFC ) .
Hein served initially under head coach Dudley DeGroot on the 1947 Los Angeles Dons team .
In March 1947 , Hein was hired as an assistant coach with the Los Angeles Dons of the All - America Football Conference ( AAFC ) .