It appears that Michigan State's Chris L. Rucker will in fact play today. He is in uniform and apparently took part in the pregame warmups, running through drills with the second-team defense.
As mentioned in previous updates to this StoryStream, Mark Dantonio left the decision to play or to not play up to Rucker. Considering the magnitude of this game, it should come as no surprise that Rucker is dressed and ready to go as the Spartans ready to take on Iowa. While he has been out of practice for a few weeks, I can't imagine it will take him long to shake off the rust, so for MSU this will be a very nice boost to their secondary as they take on Ricky Stanzi and the Hawkeyes.
UPDATE: According to ESPN's Heather Cox, Rucker will not start, but other than that there are no restrictions on him.