This off-season, the NFL coaching carousel has been nothing short of riveting. The Baltimore Ravens parted ways with John Harbaugh after 18 seasons, Mike Tomlin resigned from the Pittsburgh Steelers after 19 years, and the Buffalo Bills dismissed Sean McDermott following a divisional-round defeat to the Denver Broncos.

New head coaches often bring in fresh staffs, making coordinator hires equally significant. As evidence, consider the changes implemented by the Detroit Lions last season.

A number of coordinator positions remain open, specifically: 10 offensive and 8 defensive coordinator spots are still up for grabs, including key teams like the Ravens, Bills, and Dolphins, among others.

Below, CBS Sports writers provide grades for all the new coordinator appointments in the NFL.