"Greg Jennings - Needless to say, Jennings is a great receiver and a very big part of the Packers' offense. He suffered a concussion in preseason action, and will be held out of the rest of the preseason. He's reportedly going to be fine for the start of the regular season, but anyone who watches sports knows that concussions have a nasty way of lingering and causing problems for longer than you think they should. Aaron Rodgers developed very strong chemistry with Jennings last year, so his status is worth noting."