Update: in listening to Gibbs' postgame comments, he said that this was done on gameday in order to keep an extra TE active because of injury concerns there. If Cooley or Fauria had been limited due to their injuries, then he said that a lot of offensive packages that they'd game planned wouldn't have been possible. From his comments, he said he felt "terrible" doing this to Duckett, which clearly indicates to me that Duckett will normally be active and probably fits into the team's plans (however much or little that may be). BTW, the reason that Cartwright (who started to get 2nd half carries until he fumbled) and not Duckett was active was because Rock is a special teams player while Duckett is not. IMHO Cartwright's fumble helps to ensure that Duckett will be the guy who gets late game carries to the extent that they want to rest Portis and Betts.