Bobby Hull, the former NHL legend with the Chicago Blackhawks, is part of an unfortunate trend being exposed in hockey with regards to CTE.

Bobby Hull, the Hall of Fame forward and two-time NHL MVP who helped the Chicago Blackhawks win the Stanley Cup in 1961, had chronic traumatic encephalopathy when he died two years ago, his widow said in a statement released on Wednesday.

He insisted on donating his brain,” said Deborah Hull, Bobby Hull’s wife of almost 40 years, “feeling as though it was his duty to help advance research on this agonizing disease.”