McFadden shares the worst-kept secret in Oakland

The Oakland Raiders haven’t officially named a starting quarterback.  Unofficially, everyone knows that that Matt Flynn, barring injury or a preseason collapse, will be the guy. If there was any doubt about that, running back Darren McFadden removed most of it on Wednesday, during an interview on NBCSN’s Pro Football Talk. “Yes, pretty much,” McFadden…