In Brian's Purdue game column, he says:
I sort of had the Kovacs information but it was only one unconfirmed source so I held it and hoped it was not true. Now that it is obviously true I can tell you a couple things about it: It is supposed to be an MCL sprain, which means he can barely move his leg at the moment and will be out a few weeks. When the coaches say he's "questionable" for Iowa they're in all likelihood… …lying their boo-boos off. Kovacs did not practice Tuesday but no one noticed this because they threw Matt Cavanaugh out there in #32.
But in today's Detroit News, there's this article:
As for Michigan's injuries, safety Jordan Kovacs, who missed the Purdue game with a knee injury, is "day-to-day," Hoke said. But the junior did run around a bit in practice Sunday. "I know he'll be back this week," said senior defensive lineman Ryan Van Bergen. "He was running around looking pretty good (on Sunday). The doctor said he wasn't going to play (against Purdue), but if you asked Jordan, he was going to play. We'll have him back."
This sounds considerably more promising. Hopefully his injury isn't as bad as Brian's information.