When observers inside and outside the game discuss college football coaching, they tend to speak in terms of its intimidating, old-fashioned value systems: capital-A Authoritarianism, capital-P Patriarchy, a rugged individualism that discounts family life in favor of winning. Any study of the game’s great leaders, however, makes it clear that family (or the absence of it) in general tends to be a powerful motivator. That was true for the early coaches who came from society’s margins—Grambling’s Eddie Robinson (son of a sharecropper), Notre Dame’s Knute Rockne (son of Norwegian immigrants)—and it remains true today. On this Mother’s Day, here is a look back at five stories from through the years about college football coaches and their mothers—and the pride, pain, joy, sacrifice and humor that comes with raising the future boss.…