Black Monday has arrived in the NFL. While 14 teams are preparing for the playoffs, the other 18 are beginning their offseason. For some of those teams, that means starting over. The Monday following the NFL regular season traditionally brings firings of both head coaches and general managers, and we will be tracking the GM moves here.

NFL regular season complete, it's time to move into offseason mode for 18 of the NFL's 32 teams. Realistically, some of them have already done so -- especially those who have made changes at the head coach or general manager positions.

Check out some of the stats and history behind each of the head coaches that have been traded in NFL history.

In a playoff field filled with eight former Super Bowl coaches, rings are mostly what separates the top coaches from the bottom of the list.

For struggling NFL teams the end of the regular season triggers an annual exercise in bloodletting known around the league as "Black Monday" and the action got under way early this year as head coaches were sent packing.

Young quarterbacks? Unstable franchises? Cap space? Considering every factor, here's a ranking of the top job openings in the NFL this offseason.