Who is Ralph from The Sportswriter and what is their importance?

Ralph is Frank's son and his oldest child. He contracted Reye's Syndrome and became very ill. While he was in the hospital, Ralph became delirious and would often say odd things that made him appear more mature than his years. Frank stayed by Ralph's side during his illness, often finding humor in the situation despite the gravity. When Ralph died, it was quiet and unmarked until a nurse came in to tell Frank and X. Afterward, Frank went home and watched a ball game. Frank has never forgotten this terrible time in his life, and he continues to grieve for his son. Often, he allows his grief to cause him to act in heartless ways. His heartlessness eventually ending his marriage.