It looks like Brooks Orpik may be missing some time, as the Penguins have (or will soon) call up defenseman Ben Lovejoy from Wilkes-Barre.  Jonthan Bombulie reported just earlier tonight on his twitter account:

Ben Lovejoy is not on the ice for warm-ups. Safe to assume he's going up.

For salary cap reasons the move may not be official until tomorrow, but Pittsburgh wouldn't hold Lovejoy out if they didn't need him in the NHL.

Brooks Orpik's undisclosed injury was being looked at today, no official word on what the prognosis was, but without Orpik the Pens would only have five defenseman, making another minor league call-up a necessity for tomorrow night's game against the New Jersey Devils.

Lovejoy recorded a plus/minus of +42 last season in the AHL, top in the league.  He was limited in training camp by a shoulder injury that shelved him early in the regular season.  However he has played the last seven games in Wilkes-Barre, posting 2 goals, 1 assist and a +2 rating.  Lovejoy has two career NHL games (both last season).

If Orpik is knocked out of the lineup, your starting six Penguin defenseman tomorrow night will only include one member of the Stanley Cup winning team from just five months ago (Mark Eaton).  The other five will be Lovejoy, 1 game NHL veteran Deryk Engelland, Alex Goligoski, Martin Skoula and Jay McKee.