Miller will definitely be less effective - you would expect - with Leftwhich th r o w I n g t h e b a l l . . . . You know, because his release is slower than it took to type that sentence. That being staid, you figure he'll still be looking to Miller on check downs, which he is sure to have a few times. On the other hand, Pettigrew is the hot hand after reaching pay dirt last week (finally), but up against a top ten D vs TEs, I would still go with Miller, but strictly on match-ups, if that makes sense. Plus, Big Ben doesn't strike me as a guy who will stay away very long if at all possible (remember him playing through the high ankle sprain last year?), so I feel Miller remains the more permanent choice for the remaining 6-7 weeks of your season.
Hope that helps. Best of luck!
RB: Martin / Lynch / Lacy / Ridley / Wilson / Michael
WR: A Johnson / VJax / Gordon /Ja. Jones / Nicks / Douglas
PK: Bailey; DST: KC