And that will continue next year unless they revamp their D. People don't like it, but a player like Del Zotto would be great (and cheap) playing on the third pairing with a rookie. There are lots of them. Cheap, experienced, veteran Ds who can guide a young rookie into the league while watching out for them. Help calm them down. Win some physical battles. Teach them about positioning. Let them feel comfortable that they can just go out there and play their game and take some risks knowing that they have a steady and experienced partner who will there to help get him out of trouble. The Leafs' have, so far, chosen to go a failed route.
(and no, as someone else mentioned I think, neither Liljegren or Sandin are going to be partnered with Muzzin or Rielly next year)