NASCAR star Denny Hamlin's father, Dennis, has died and his mother, Mary Lou, remains hospitalized following a fire at their North Carolina home on Sunday, December 28. The Gaston County Office of Emergency Management and Fire Services confirmed the news on Monday, December 29, according to WSOC-TV. Both Dennis, 75, and Mary Lou, 69, were transported to a local hospital with "catastrophic injuries." Us Weekly has reached out to Gaston County EMS for comment.