Dan Rooney, the longtime owner of the NFL's Pittsburgh Steelers who also served as President Obama's ambassador to Ireland, died Thursday at 84, ESPN reported.
Rooney was elected to the Pro Football Hall of Fame in 2000. He was the primary force behind the NFL's mandate that teams interview at least one minority candidate for vacant head coach and general manager positions, popularly known as the "Rooney Rule."
He served as ambassador to Ireland from 2009 until he resigned in 2012.
Tributes quickly started to pour in.
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