- Pittsburgh Steelers owner Dan Rooney, who helped build the franchise into the most successful NFL team in history, died aged 84, the team announced. Rooney, who also served as former US ambassador to Ireland between 2009 and 2012, was widely credited with helping to shape the modern NFL in a lifelong association with the game. He was the driving force behind what became known as the "Rooney rule" which mandates that NFL teams interview at least one minority candidate when they are seeking to hire either a head coach or general manager. But it was his work with the Steelers which provides his greatest legacy. The son of Steelers owner, Art Rooney, Dan Rooney had worked alongside his father at the franchise in different capacities since childhood and took over the day-to-day running of the team in 1969.