This is simply pulling defensemen out of the regular 'Rankings' list and adding a few more at the bottom. Ratings are a reflection of a player's trade value in 'rollover' fantasy hockey pools. They reflect a players predicted points, historical points, injury risk, team "reputation/potential powerhouse" value, powerplay time, and long-term potential. Basically, if you are in a keeper league, this is my opinion based on my statistical model of a player's 'trade value'. Naturally, individual trades would depend on the direction you are taking with your team at the present.
October 2014 complete