In "The Outsiders," who does Darry fight in the rumble, and what is the significance of such a fight?

Paul Holden is a soc who was on the football team that Darry quit after his family fell apart, forcing him to take care of his brothers. Both boys are equally good athletes, and both had a degree of respect for one another on the football field and in school. However, due to the Shakespearean nature of the Greaser-Soc feud, the two boys who were once near-friends are forced to face off against each other in combat. This is a moment of irony in the novel, among many others.