So far, only three Pac-12 teams retained their 2013 offensive and defensive coordinators: Arizona, Colorado and Washington State.
Here's a look at who's in, who's out and what it means, starting in the North Division:
Out: Defensive coordinator Andy Buh, who will be reassigned as a position coach, probably linebackers, if he remains in Berkeley. Coach Sonny Dykes also fired defensive tackles coach Barry Sacks and defensive backs coach Randy Stewart.
In: Art Kaufman, whose defense at Cincinnati ranked ninth in the nation last season.
Thoughts: Kaufman, 55, takes over perhaps the worst defense in Cal history, a unit that was injury-ravaged but also was often unsound and seemingly uninspired, allowing an eye-popping 46 points per game in 2013. The good news: If the injury issues resolve themselves with the healthy return of talented players such as defensive end Brennan Scarlett, safety Avery Sebastian, defensive tackle Mustafa Jalil and cornerback Stefan McClure, the improvement could be dramatic. Dykes also hired Greg Burns to coach the secondary. He was at USC from 2002-05 and Arizona State from 2008 -11. He spent last season at UMass.
Out: Longtime defensive coordinator Nick Aliotti retired.
In: Don Pellum was promoted from linebackers coach.
Thoughts: The promotion of the 51-year-0ld Pellum stuck with the "Oregon Way" of promoting from within, though there was mutual interest between coach Mark Helfrich and former USC coordinator Clancy Pendergast. Pellum won't have to rework much with the Ducks' hybrid 3-4 scheme. As noted here, since 2009, "the Ducks have finished no lower than third in the Pac-12 in yards-per-play allowed. That includes leading the conference in 2009, 2010 and, yes, 2013, when the Ducks finished seventh nationally by that metric." The Ducks did falter a few times last season, most notably against Stanford, Arizona and Oregon State, and often had trouble against physical running games as well as on third down. Helfrich did make a quasi-outside hire when he brought in Erik Chinander to take over the Ducks' outside linebackers, which Aliotti coached. Chinander, 34, is a former Oregon graduate assistant who worked under Chip Kelly with the Philadelphia Eagles last season.
Out: Offensive coordinator Danny Langsdorf left to become the quarterbacks coach for the New York Giants.
In: John Garrett, who was the wide receivers coach for the Tampa Bay Buccaneers last season. He was on the staff of the Dallas Cowboys from 2007-12, where his brother Jason Garrett is the head coach.
Thoughts: Garrett, who last coached in college at Virginia from 2004-06, shows that coach Mike Riley remains married to a pro-style scheme. Garrett will also coach quarterbacks and tight ends, but it has not yet been determined who will call plays -- Riley has done so for the past two seasons. Garrett and Riley have known each other since 1991, when Garrett played receiver for Riley's San Antonio Riders of the World Football League. The good news for Garrett is the Beavers are strong at QB (Sean Mannion) and deep at tight end. The bigger questions are making the running game more consistent and replacing WR Brandin Cooks' production.
Out: Defensive coordinator Derek Mason, who became the head coach at Vanderbilt.
In: Lance Anderson was promoted from outside linebackers coach, a position he will continue to coach.
Thoughts: Another promotion from within that will ensure the Pac-12's best defense has schematic continuity. Anderson has been at Stanford for seven seasons. He coached DTs from 2007-09. He was also the recruiting coordinator from 2007-11. The Cardinal also hired Peter Hansen as inside linebackers coach. He replaces David Kotulski, who was named Vanderbilt’s defensive coordinator under Mason. That was another move that maintains continuity, as Hansen spent the 2009 and 2010 seasons at Stanford as a defensive assistant before following Vic Fangio and Jim Harbaugh to the San Francisco 49ers.
Out: Steve Sarkisian brought most of his staff from Washington to USC, including defensive coordinator Justin Wilcox, but not offensive coordinator Eric Kiesau, who was not retained by new Huskies coach Chris Petersen
In: Offensive coordinator Jonathan Smith and defensive coordinator Pete Kwiatkowski
Thoughts: Smith, the overachieving former Oregon State QB, is a real up-and-comer. Petersen trusts him enough to give him play-calling duties, even though he was not the offensive coordinator last year at Boise State. He'll also coach quarterbacks, so he'll play a central role in determining who wins the starting job this fall. Before joining Petersen at Boise State, Smith spent the 2010 and 2011 seasons as the offensive coordinator and quarterbacks coach at Montana. Kwiatkowski spent the previous four seasons coordinating the Boise State defense. He was the defensive line coach before being elevated to defensive coordinator in 2010, when he replaced Wilcox. The Broncos led the Western Athletic and Mountain West Conferences in total defense and scoring defense in each of his first three seasons and were third and second, respectively, in 2013.
No change: Head coach Mike Leach is his own offensive coordinator and Mike Breske is back to coordinate the Cougars defense, which was disappointing in 2013, slightly lagging behind its 2012 numbers.