'Black Monday': Four NFL coaches leave posts at end of season

Jim Harbaugh, Mike Smith, Rex Ryan and Marc Trestman
San Francisco 49ers coach Jim Harbaugh, Mike Smith of the Atlanta Falcons, New York Jets Rex Ryan and Marc Trestman of the Chicago Bears have left their posts

San Francisco 49ers' Jim Harbaugh is one of four National Football League coaches to leave their posts after the close of the regular season.

Harbaugh is likely to take the head coach job at the University of Michigan after a season which saw the 49ers win eight and lose eight games.

The New York Jets have sacked Rex Ryan, while Chicago Bears have dismissed their coach Marc Trestman.

Atlanta Falcons have also announced the departure of Mike Smith.

The Falcons had a 6-10 win-loss record this season, their second successive losing year under Smith, and lost 34-3 at home to the Carolina Panthers on Sunday.

NFL's 'Black Monday'
'Black Monday' is the day after the final match of the NFL regular season, when owners traditionally sack coaches and general managers of underperforming teams
The term was first used in the late 1990sexternal-link by newspapers in the United States

Harbaugh leaves the 49ers with a 49-22-1 record, which includes a 20-17 win over the Arizona Cardinals in his final game on Sunday.

New York Jets owner Woody Johnson dismissed Ryan and general manager John Idzik following Sunday's 37-24 win over the Miami Dolphins. The Jets won four and lost 12 of their matches this year.

The Bears sacked Trestman and general manager Phil Emery after a 5-11 season in which star quarterback Jay Cutler struggled to find form.