The legendary founder of the Pittsburgh Steelers, Arthur Rooney, Sr., just called himself Art, but to others, he was known as "The Chief." The nickname caught on outside of Rooney's inner circle and became popular with fans and the media — but not necessarily with Rooney. "No one ever called him Chief to his face," said his son Art Rooney, Jr., in The Ones Who Hit the Hardest, a book about the NFL in the 1970s. "We called him Dad or Mr. Rooney or Your Majesty or something."