Dykes is Louisiana Tech's man

Pete Carroll's decision to leave USC for the Seattle Seahawks now has hit Arizona hard.

Sonny Dykes, who rebuilt Arizona's offense, will be named Louisiana Tech's head coach this afternoon, ESPN.com's Graham Watson has learned.

Dykes, 40, will replace Derek Dooley, who left Ruston to take over at Tennessee when Lane Kiffin bolted for USC to replace Carroll.

See the dominoes go down!

Dykes ran the Wildcats' offense for three years after learning the spread from then-Texas Tech coach Mike Leach. He deserves a lot of credit for the Wildcats move from the bottom of the Pac-10 to the top-half.

You can read Dykes' bio here.

The Wildcats now will head into the 2010 season with two new coordinators. Defensive coordinator Mark Stoops left for the same job at Florida State after the Holiday Bowl.

Head coach Mike Stoops replaced his younger brother by promoting Tim Kish and pairing him with Greg Brown to be co-defensive coordinators. Brown was hired away from Colorado.

It's easier to feel confident about the Wildcats' defense because they were running the Stoops family system and will continue to do that. Of course, replacing seven starters is a challenge even for a staff that isn't making any changes.

It won't be easy to replace Dykes, whose ability to adapt schemes to fit his personnel was a particular strength.

On the plus side, whomever Stoops pursues for the vacancy will be handed a good core of returning talent, particularly at the skill positions, starting with junior quarterback Nick Foles, senior running Nic Grigsby and junior receiver Juron Criner.

Still, that's a lot of X's and O's and leadership turnover for any staff.

It will be interesting to see if the next coordinator can help Foles make the next step as a quarterback.