Dennis Hamlin, father of NASCAR driver Denny Hamlin, has died at age 75 from injuries sustained in a house fire in Gaston County, North Carolina. First responders found two people outside the home, with Dennis Hamlin later passing away at the hospital. His wife, Mary Lou Hamlin, remains in critical condition. The cause of the fire is under investigation. Dennis Hamlin was a significant supporter of his son's racing career.