Erhardt was on the Giants’ coaching staff from 1982 to 1991, working under Ray Perkins and Bill Parcells.
Erhardt was also head coach of the New England Patriots from 1979-81, compiling a 21-27 record. Parcells was the team’s linebackers coach in 1980 and retained Erhardt on his staff when he became coach of the Giants.
During Erhardt’s eight seasons as offensive coordinator under Parcells, the Giants reached the playoffs five times, won three National Football Conference East titles and two championships.
“Ron was a wonderful man and a great coach,” Giants President and Chief Executive John Mara said in a statement. “He was a big part of our success in the 1980s and was an important contributor to our first two Super Bowl championships.”
Erhardt also won two college football championships while coaching at North Dakota State, where he had a 67-7-1 record.
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