Top assistant coaches come and go, usually depending on their unit’s success the previous season.

If a coordinator or assistant led a unit that performed well, he’s likely off to greener pastures. If his unit didn’t fare well, he’s often headed for the unemployment line or a demotion at another program.

If his unit was modestly successful — or very good at a strong program — he’s likely to stay. A previous relationship with the head coach or strong recruiting skills also tend to extend the tenure of assistants.

With the postseason over for every SEC team but Alabama, many changes have been made on SEC coaching staffs while many remain to be made.

Here’s a list of the 10 most interesting changes so far:

EDDIE GRAN TO KENTUCKY

Mark Stoops said he’s tried to lure Gran for several years. The offensive coordinator last season at Cincinnati, Gran coached with Stoops at Florida State. With a title including assistant head coach, Gran also will coach running backs and special teams. Stoops fired Shannon Dawson after only one season that included a late-season collapse costing the Wildcats a wild-card berth. “I just wasn’t comfortable with the overall direction and leadership (on that) side (of the ball),” Stoops said. “The X’s and O’s were good, but our players need to play better. That starts obviously with me and getting the assistant coaches to get the players to perform at a high level. We’ve got to put them in position to be successful in all areas.”

BOB SHOOP TO TENNESSEE

Butch Jones recruited the Penn State defensive coordinator, whose defense ranked 14th in the nation in 2015 and second in 2014. A 27-year coaching veteran, Shoop was the defensive coordinator at Vanderbilt from 2011-2013 under James Franklin, moving with Franklin to Penn State and later turning down overtures from LSU and Auburn. The former Yale football player, was head coach at Columbia for three years. He replaces John Jancek, who Jones did not retain.

JAMES COLEY TO GEORGIA

Coley made the opposite move made by Mark Richt, leaving Miami to join Kirby Smart as receivers coach at Georgia. A highly regarded recruiter in south Florida, Coley could give Richt some strong competition recruiting an area filled with talent. Coley will earn $450,000 over the next two seasons, plus $150,000 bonus if he’s still on the staff in March 2017.

SAM PITTMAN TO GEORGIA

Kirby Smart made a splash hiring away Pittman, who coached the nation’s biggest offensive line at Arkansas. With the Razorbacks, Pittman’s units were known for outstanding run blocking, helping Alex Collins run for more than 1,000 yards the last three seasons. Getting Pittman wasn’t cheap. The Bulldogs gave him a three-year deal for $650,000 per year, plus a $250,000 bonus at the end of this month. Arkansas coach Bret Bielema replaced Pittman with Buffalo Bills assistant line coach Kurt Anderson.

KEVIN STEELE TO AUBURN

A hired gun around the SEC, Steele left LSU after one year after leaving Alabama, where he filled two roles in two years. Steele also coached seven years at Tennessee. He’s coached a pair of two-year stints under Nick Saban at Alabama. Steele’s resume includes stops at Nebraska, Florida State and Clemson. He also served four seasons as linebackers coach of the Carolina Panthers and was head coach at Baylor for another four seasons. Steele replaces Will Muschamp, who was hired as head coach at South Carolina. Steele was reported to get $1.4 million in a multi-year deal from Auburn, a raise of about $400,000. He’s said to be interested in qualifying for a state pension in Alabama. He has a daughter who graduated from Auburn. His brother is an associate athletic director at the school.

KURT ROPER TO SOUTH CAROLINA

If Gamecocks fans were disappointed in the hire of Muschamp after a long coaching search, they must have been scratching their heads at the hire of Roper as offensive coordinator. An offensive analyst with the Cleveland Browns this past season, Roper was Florida’s offensive coordinator in 2014, Muschamp’s final season with the Gators. Roper was unable to get the Gators untracked in his only season at Florida. He will inherit an offense without a proven quarterback that’s losing star WR Pharoh Cooper. Former co-offensive coordinator Shawn Elliott, the interim coach after Steve Spurrier resigned, is remaining on the staff as offensive line coach.

DEMONTIE CROSS TO MISSOURI

A former Mizzou player, Cross should bolster the Tigers’ recruiting efforts in the St. Louis area. A co-defensive coordinator at Texas Christian, where he’s coached the past three seasons, Cross  served four seasons with the Buffalo Bills. He’s also coached at Mizzou, Kansas, Iowa State and Wisconsin. Cross’ hiring indicated that new coach Barry Odom would not hire successful defensive line coach Craig Kuligowski, who was hired as defensive line coach at Miami, as his replacement as defensive coordinator.

BARRY ODOM PROMOTED AT MISSOURI

Gary Pinkel’s resignation came as a shock throughout the football world. It provided Missouri with the opportunity to hold onto Odom, who had earned a stellar reputation at Mizzou and Memphis. A former Tigers player, the 39-year-old Odom is expected to add youthful energy to Mizzou’s recruiting efforts. The promotion was highly popular with Mizzou players. Odom’s Mizzou defense ranked seventh in the nation in 2015, his first year as the Tigers’ defensive coordinator after serving in that role under Justin Fuente at Memphis.

WILL MUSCHAMP TO SOUTH CAROLINA

A celebrated defensive coordinator, Muschamp gets a second chance as a head coach after a miserable four-year stint at Florida. South Carolina pursued several candidates unsuccessfully before turning to Muschamp, who should revitalize the Gamecocks’ recruiting and energize the program after Spurrier’s departure. A defensive specialist, Muschamp hired Kurt Roper as offensive coordinator, raising some eyebrows after Roper’s unsuccessful season with Muschamp at Florida in 2014.

KIRBY SMART TO GEORGIA

The Alabama defensive coordinator was brought into a firestorm to replace Richt, who consistently guided Georgia to 10-win victories but won only two SEC titles. The Bulldogs are gambling that the former Georgia player will push the Bulldogs over the hump in the SEC East and close ground on Alabama and the other SEC powers. Georgia, a program with rich resources and plenty of home-grown talent, chose Smart over an established head coach. In another swap between SEC programs, Saban hired Georgia’s Jeremy Pruitt as Smart’s replacement.