| Biographical details | |
|---|---|
| Born | February 27, 1931 Mandan, North Dakota, U.S. |
| Died | March 21, 2012 (aged 81) Boca Raton, Florida, U.S. |
| Alma mater | University of Jamestown |
| Coaching career (HC unless noted) | |
| 1956 | Williston HS (ND) (assistant) |
| 1957–1959 | St. Mary's HS (ND) |
| 1960–1962 | Bishop Ryan HS (ND) |
| 1963–1965 | North Dakota State (assistant) |
| 1966–1972 | North Dakota State |
| 1973–1976 | New England Patriots (RB) |
| 1977–1978 | New England Patriots (OC) |
| 1978 | New England Patriots (interim co-HC) |
| 1979–1981 | New England Patriots |
| 1982–1990 | New York Giants (OC) |
| 1991 | New York Giants (assistant) |
| 1992–1995 | Pittsburgh Steelers (OC) |
| 1996–1997 | New York Jets (OC) |
| 1997–1998 | New York Jets (QB) |
| Administrative career (AD unless noted) | |
| 1968–1973 | North Dakota State |
| Head coaching record | |
| Overall | 61–7–1 (college) 21–28 (NFL) 45–9–2 (high school) |
| Bowls | 3–1 |
| Accomplishments and honors | |
| Championships | |
| 2 NCAA College Division (1968–1969) 6 NCC (1966–1970, 1972) As offensive coordinator:
| |
Ronald Peter Erhardt (February 27, 1931 – March 21, 2012) was an American football coach at both the collegiate and professional levels. From 1979 to 1981 he served as head coach of the National Football League (NFL)'s New England Patriots.