With the San Diego Chargers' coaching roster set (I'm assuming), the rest of the AFC West is still scrambling to find the best of what's left to complete their coaching staffs.
69-year old Bill Muir, dragged out of retirement by Todd Haley to be the Offensive Coordinator of the Chiefs after Charlie Weis left town, has retired once more. To replace him, the Chiefs have hired Brian Daboll. Daboll was the OC for the Miami Dolphins last season and spent the two years before that as Eric Mangini's OC with the Browns. Daboll previously worked with Chiefs Head Coach Romeo Crennel with New England years ago.
It would appear that Crennel, like Todd Haley (now OC for the Steelers) before him, is not too eager to give up control over his side of the ball. He will retain the title of Defensive Coordinator while also being the Head Coach. Perhaps he's trying to earn two paychecks.
To replace the new Oakland Raiders Head Coach Dennis Allen, John Fox brought back recently-fired Jaguars Head Coach Jack Del Rio to be his Defensive Coordinator once more. Del Rio was Fox's DC for one season with the Panthers (2002, when the Panthers had one of the best defenses in the league) before getting hired by Jacksonville.
Dennis Allen went into the college ranks, pulling former co-Defensive Coordinator for the Stanford Cardinal Jason Tarver to be his DC in Oakland. Greg Knapp, who was the Raiders' Offensive Coordinator from 2007-2008 before being fired by Tom Cable, has been brought back to once again run the offense. Perhaps he'll have better luck with Carson Palmer (and Terrelle Pryor) than he did with Daunte Culpepper and JaMarcus Russell