 In Canada , there was little emphasis on football , much to the disappointment of Rex . By the time Rex was a teenager , Doris realized he and his brothers were too much to handle for a single mother trying to advance her career . She decided it was in the best interest of the brothers to send them to live with their father , who was the defensive line coach for the Minnesota Vikings at the time . The reasons behind this were to keep them out of trouble and to help them expand their knowledge of the game of football where it was more prevalent . 
