 In 2002, Irwin had his story about his favorite racehorse, Swaps, published by Eclipse Press as part of its biographical series of racehorses.In 2004, 2005 and 2006, Irwin purchased yearling horses at public auction which later went on to win Grade 1 races.Irwin was a founding director with the equine-related charity "Race for Education,"  which raises money to provide college scholarships to the offspring of backstretch and farm workers.