Who is Doug Swieteck's Brother from The Wednesday Wars and what is their importance?

Doug Swieteck's brother is Holling's nemesis throughout the novel. Doug Swieteck's brother, never named in the novel, is a bully, who seems to have it out from the beginning of the story for Holling. During a soccer game at lunch, Holling accidentally forces Doug Swieteck's brother's head into a pole. Following the accident, Doug Swieteck's brother remains on medical observation for quite some time. When Holling plays Ariel in the local Shakespeare production, it is Doug Swieteck's brother who pastes photos of Holling in yellow tights all over school. To get revenge, Holling throws a snowball at him later, but before Doug Swieteck's brother can respond, Holling is hit by a bus. Following that incident, Holling seems to be free.