Pens coach Mike Johnston expects to know more about the extent of Ehrhoff's undisclosed injury after additional testing Friday morning.

Pens coach Mike Johnston expects to know more about the extent of Ehrhoff's undisclosed injury after additional testing Friday morning.

Analysis:

The Penguins defenseman twice collided with the Avs' Jarome Iginla, with Iginla initiating the first check and Ehrhoff, the second one. The hits were both up high, making it possible that Ehrhoff is suffering from a shoulder-related ailment.