When you think of a team's best players, your first thought is not likely to be of Shawn Thornton or Justin Abdelkader. While these players play on their team's fourth lines, they and their linemates are very important to their team's success.
At any moment, the fourth line can change the momentum of a game at any moment. It could be a big hit, a fight or even, on the odd occasion, a goal. They may not be the most glorified members of the team, but they are important nonetheless.
From 30th to first, here are the best and worst fourth lines in hockey.