"The contingency is to have the next two guys ready to go," Detroit offensive coordinator Scott Linehan said. "Joe [Fauria]'s been in the system all year. Dorin [Dickerson] has done a really nice job of picking up what we're doing. We've done extra tackle stuff before, so that's not new to us."
Expect Fauria, a rookie who has seven touchdown catches this season, to start in place of Pettigrew and for Dickerson to be used in two-tight end sets.
Pettigrew has 41 catches for 416 yards and two touchdowns this season and was the Lions' only true multipurpose tight end.
Beyond Pettigrew, wide receiver Calvin Johnson is officially listed as questionable with a knee injury along with starting linebacker DeAndre Levy (foot) and starting cornerbacks Rashean Mathis (illness) and Chris Houston (toe).
Cornerback Darius Slay, who has not practiced all week as he recovers from a torn meniscus, is doubtful.