Vernon Biever/Associated Press
Forrest Gregg, one of the N.F.L.’s greatest offensive tackles and a key figure on Coach Vince Lombardi’s five Green Bay Packer championship teams of the 1960s, died on Friday in Colorado Springs. He was 85.
His wife, Barbara Gregg, said the cause was complications of Parkinson’s disease, which Gregg announced that he had in 2011. He died in a hospital in Colorado Springs, where he also lived. After retiring as a player he had been the head coach of three N.F.L. teams.
At 6-foot-2 and 250 pounds, Gregg was not especially large for an interior lineman of his era.