Michael McCaskey, who led the Chicago Bears for nearly three decades following the death of his grandfather George Halas, died Saturday after a lengthy battle with cancer, the team said. He was 76.

“My heart is heavy as I think about Michael McCaskey and can’t believe he is no longer with us,” Bears President and CEO Ted Phillips said in a statement released Saturday night.

“Michael was a good man, gone much too soon. He presided over the only Super Bowl Championship Chicago Bears team in 1985, and I know he is still smiling about that magical season.”

The oldest of Ed and team matriarch Virginia McCaskey’s 11 children, Michael McCaskey assumed operational control of the franchise in 1983 as president and CEO following the death of Halas, a founding father of the NFL and the franchise.

Michael McCaskey became chairman in 1999 and remained in that role until George McCaskey took over in 2011.

The Bears made 12 playoff appearances and won the Super Bowl in January 1986.

Michael McCaskey was chosen NFL Executive of the Year by his peers following the 1985 championship season.

He is survived by his 97-year-old mother, children John and Kathryn, and grandson Jackson.