CRANBERRY, Pa. -- The Penguins' defense pairings remained the same through much of training camp.
The top pairing of Brian Dumoulin and Kris Letang, of course, stayed together. Mike Matheson then skated with John Marino on the second pairing, while Marcus Pettersson worked on the third pairing alongside either Mark Friedman or Chad Ruhwedel.
When Matheson missed the Penguins' first three games of the season with a nagging lower-body injury, it forced the Penguins to change up the pairings.