The NHL has rolled through the midpoint of the season, so it's time to start worrying about what each team still needs to challenge for a playoff spot down the stretch ... or just find some respectability. This week's Power Rankings -- voted on, as always, by ESPN's panel of experts -- are full of concerns and consternations.
How we rank: We use a panel of voters, and these rankings reflect which teams voters think would win head-to-head matchups. Higher-ranked teams are favored over lower-ranked teams. A run of wins doesn't guarantee a jump, and a couple of losses don't guarantee a fall.