THE grandson of Pittsburgh Steelers founder Art Rooney has died aged just 51.

Matthew Rooney passed away at his home in East Hampton, New York , on August 15.

His cause of death is yet be revealed.

The AFC North team released a statement on Wednesday.

"The Rooney Family is mourning the loss of Matthew," a spokesman said.

Matthew was the son of JoAnn and John J. Rooney.

His father was a minority shareholder of the Steelers .

That was until he sold the majority of his 16 per cent stake in 2009.

Matthew graduated from NYU before getting a master's at Columbia University.

He split his time between New York and Los Angeles .

The grandson of the NFL icon settled down in Brooklyn Heights and East Hampton.

He is understood to have been a writer and artist. Travis Kelce to find

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