Nothing more than an oddity, we're sure. Maybe the site just projects based on the QB it considers the stronger fantasy option? In any event, NFL.com has a Week 3 fantasy projection for Matt Cassel as a Vikings QB, but not Christian Ponder (he is listed on Page 3 with no stats)
Unless we are mistaken, every other player listed with projections is, in fact, that team's expected starter in Week 3.
In any event, it's something to talk about other than Greg Jennings.