People
My father used to play with my brother and me in the yard. Mother would come out and say, 'You're tearing up the grass.' 'We're not raising grass,' Dad would reply. 'We're raising boys.'
— Harmon Killebrew

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker recalls a father's reply to a mother's complaint about the damaged lawn: the family isn't cultivating grass but children. The humour lies in prioritising play and upbringing over neat turf. Wear on the yard becomes evidence that the boys are being properly raised.
Context reviewed