Michigan AD David Brandon was very pleased with the move:
"Greg has proven to be one of the top coordinators in the country, college or pro, and he is regarded as one of the best recruiters in college football," said Brandon. "Greg's resume speaks for itself, and he has done great things with our defense in his two years with the program. He has great passion for the University of Michigan and for the young men that represent our team. We are glad to have Greg in the fold for the foreseeable future."
Brady Hoke also lauded the extension:
"We're excited Greg will remain at Michigan for the next four-plus years," said head coach Brady Hoke. "What he's done for this program, our defense and for our kids on and off the field over the last two years, he's the best there is. I've known Greg and Ann and their kids for my entire coaching career, and I'm personally thrilled they will be here for a long time."
Last year, Mattison's defense ranked 20th in the country allowing 19.8 points per game and 13th nationally in yards allowed per game at 320.