Nothing wrong with analyzing Knapps' career and looking back on what he did.
But whatever he did years ago with the 49ers either good or bad will have no effect on what the Raiders do on the field in 2012, this is a new opportunity with new players and working for a new GM and head coach.
Consider Mike Shanahan, he once coached back to back Superbowl victorys, but his last 5 NFL seasons as a head coach he has an overall losing record and no playoff teams.
And then Mike McCarthy, he once was OC for a terrible 49er team that had one of the leagues worsts offenses, now he's considered one of the top offensive minds in the game and arguably the best head coach in the league.
Looking into the past is no guarantee to what the future will hold, to many variables.
So if Knapp can mesh with our skill and the offense can build a chemistry with each other we will be fine, whats in the past is in the past, this upcoming season will be a new start and the launch of the Raiders future.