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Atlanta Falcons
Fired Mike Smith and replaced him with former Seahawks Defensive Coordinator Dan Quinn. Let offensive coordinator Dirk Koetter go to Tampa Bay and replaced him with Kyle Shanahan.
Smith remains unemployed.
Buffalo Bills
Doug Marrone opted out of his contract. He was replaced by Rex Ryan. Offensive coordinator Nathaniel Hackett was fired and replaced by Greg Roman. Marrone became the assistant head coach in Jacksonville.
Chicago Bears
Marc Trestman was fired and replaced by John Fox. Adam Gase became the new offensive coordinator for the Chicago Bears. Trestman would become the Ravens new offensive coordinator. Mel Tucker was fired and replaced by Vic Fangio
Denver Broncos
John Fox was released by the Denver Broncos and Adam Gase and Jack Del Rio were allowed to pursue other jobs. Del Rio became the new Raiders coach. Gary Kubiak became the new Broncos coach, Brian Pariani became the new offensive coordinator and Wade Phillips became the new defensive coordinator.
New York Jets
Rex Ryan was fired, along with Marty Mornhinweg and John Idzik. Defensive coordinator Dennis Thurman jumped ship to be with Ryan in Buffalo. Joe Maccagnan became the GM, Todd Bowles was hired as the head coach, Chan Gailey was hired to be the new offensive coordinator and Kacy Rodgers replaced Thurman.
San Francisco 49ers
Jim Harbaugh "mutually parted ways" and went to Michigan. Vic Fangio left to be the Bears defensive coordinator. Greg Roman left to be the Bills OC. Jim Tomsula was promoted to head coach, Eric Mangini was promoted to defensive coordinator, and Geep Chryst was promoted to offensive coordinator.