Jones' National Football League career began in 1985 with the Buffalo Bills, where he coached for 20 years; head coach Marv Levy called him the team's "secret weapon".
[1] Jones was viewed as an important figure in the development of strength and conditioning training in football, making innovations including individualized workout and diet regimens, and an emphasis on the body mass index and hydration monitoring.
[3][4] On January 19, 2013, the Bears reported that Jones would retire after 28 years of coaching.
In his career, Jones' teams qualified for the playoffs 13 times, and reached the Super Bowl five times; he worked with 43 Pro Bowlers and seven Pro Football Hall of Famers.
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