John A. "Jack" Peavey (born June 6, 1963) is a college athletics administrator and former American football player and coach. He is currently the assistant athletic director at Oklahoma Baptist University, a position he has held since 2011. Peavey served as the head football coach at William Paterson University from 1997 to 1999 and at Southwest Baptist University from 2005 to 2006, compiling a career college football record of 9–43. He played professionally in the NFL with the New England Patriots and the Denver Broncos.
Peavey has over 20 years of football coaching experience. He has had great success at the high school level and moderate success at the college level. In four seasons as the head coach at Bishop Feehan High School in Attleboro, Peavey led the Shamrocks to four state championship title games and won three of them in a row. The Shamrocks were also league champions all four years.
Collegiately, Peavey is a former head football coach for the William Paterson University Pioneers football team in Wayne Township, New Jersey. He served for three years, 1997–1999, and compiled a 5–25 overall record (1–14 conference).