McCullough spent six seasons with
The Chiefs, behind rookie
The Chicago Bears hired former
The Bears also announced Chris Tabor will become special teams coordinator and Charles London will take over as running backs coach.
Helfrich led Oregon to a 37-16 record in four seasons as head coach after serving as quarterbacks coach and offensive coordinator from 2009-12 under Chip Kelly. With their fast-paced and prolific spread-option offense, the Ducks went 46-7 in that span.
Helfrich didn't call plays as Oregon's offensive coordinator and won't in Chicago; Nagy plans to do that.
Cleveland Browns coach
The team also parted ways with run game coordinator/running backs coach Kirby Wilson, special teams coordinator Tabor, quarterbacks coach David Lee, special teams assistant Shawn Mennenga and special teams quality control coach Stan Watson.
Jackson is still weighing whether to add an offensive coordinator after also having that role past two seasons. He interviewed
The Buffalo Bills fired offensive coordinator Rick Dennison after the team finished 29th in offense.
Buffalo topped 300 yards just nine times in 17 games and scored only eight touchdowns in its last seven games. Dennison's play-calling was questioned after Buffalo scored just three points in the franchise's first playoff game in 18 years.
Davis: one more go
Davis, 34, has spent his entire 13-year career with the