He has been hospitalized with possible stroke.
http://sports.espn.go.com/nfl/news/story?id=1993188
WBZ-TV in Boston reported Wednesday that Bruschi had stroke-like symptoms, partial paralysis and blurred vision. A source told The Boston Herald for Thursday's editions that Bruschi lost partial vision in one eye, but the sight was returning. And a Patriots official told the Herald that Bruschi was up "walking and talking."
http://sports.espn.go.com/nfl/news/story?id=1993188