Pens call up Joe Morrow. UPDATED: Letang on I.R.

No clue what to make of this.

Must be some kind of injury lingering somewhere. Maybe Letang or Niskanen had a setback? 

Could this be an audition for any team scouts in town for Sunday night's game?

UPDATE: Letang has been placed on Injured Reserve.

UPDATE: Per Bylsma, Morrow is up for insurance.