Michigan extends DC Greg Mattison

ANN ARBOR, Mich. -- Michigan's defense has improved greatly over the past two years. Now the Wolverines won't let the architect of that get away for a while.

The school announced a three-year contract extension for defensive coordinator Greg Mattison on Friday, keeping him in Ann Arbor through the 2016 season.

"Michigan is such a special place, and it's exciting to know I'll have the opportunity to coach at the greatest program in college football for the next four years, and hopefully long after," Mattison said in a statement. "Part of the reason I came back here is because I wanted to work with Brady [Hoke] again, and every day I'm thankful I made that decision."

Financial terms of the deal were not disclosed. His initial Michigan contract, which was set to expire after next season, paid him $750,000 per year.

"We're excited Greg will remain at Michigan for the next four-plus years," Michigan coach Brady Hoke said. "What he's done for this program, our defense and for our kids on and off the field over the past two years, he's the best there is."

Mattison took a defense that was ranked 110th in total defense in 2010 and turned Michigan into a top-20 unit the past two seasons. At one point last year, the Wolverines were the top-ranked pass defense unit in the nation.

The 63-year-old is also one of Michigan's top recruiters and was named RecruitingNation's Recruiter of the Year for this past year.