He retired from football after the 1919 season to go into business .
After one year at Kentucky , Douglass returned to the University of Michigan where he served as an assistant football coach from 1912 to 1919 .
Douglass retired from football after the 1919 season to go into business .
After one year at Kentucky , Douglass returned to the University of Michigan where he served as an assistant football coach from 1912 to 1919 .