Worst 20 On/Off Ice Adjusted +/- Ratings

Yesterday, I posted the top 2ß on/off ice adjusted +/- ratings. This is an attempt to look at the sabermetrics and hockey problem of rating an individual player's defensive ability. I discuss the method here and credit Gabriel Desjardins of behind the net for its development. I cannot argue that this method directly determines the best defensive player in the NHL. It will select players who played well in their roles, where their team played better with them on the ice than with them off the ice. These players will be offensive and defensive stars (most are solid two-way players). In the comments Mathman criticizes it, claiming it tends to select good players on bad teams. I do not buy this criticism completely. In order to normalize +/- ratings to compare between teams, some assumptions must be made. The assumption made here... [read full story]