I found an error in my formula that was affecting the defensive ratings for hockey players before 1930. I’ve updated their pages to show the correct numbers.

The players affected are:

Howie Morenz
Newsy Lalonde
Joe Malone
Bill Cook
Babe Dye
Cy Denneny
Aurèle Joliat

Lalonde jumps up to second on the hockey list, the only hockey player beside Wayne Gretzky with a rating over 30. Morenz leapfrogs Mario Lemieux into third.