Welcome to the fourth edition of theScore's Norris Trophy Power Rankings.

These rankings focus on analytics and the all-around ability of defensemen based on this season's results rather than just points or reputation.

xGF% = the share of expected goals a team produces while a player is on the ice at five-on-five

GF% = goals for percentage at five-on-five

GAR = goals above replacement-level player

This edition dates back to March 25.

5. Jakob Chychrun, Coyotes


Who had Chychrun leading all NHL blue-liners in goals? Probably nobody. He's second on his team among all skaters in goals and points, too.

The 23-year-old is doing more than just producing offense, though. He's surpassed Oliver Ekman-Larsson as Arizona's No. 1 D-man, leading the team in ice time. His underlying numbers aren't quite elite, but they're impressive when you consider he plays for a poor team.

4. Dougie Hamilton, Hurricanes