Ranking the Bears historically great defenses

There are several categories to rank an all-time great defense; points allowed, yards allowed, sacks, turnovers, DVOA, just to name a few, but a recent string of Tweets from Football Perspective (@fbgchase) has a new one I found interesting.

They took the ratio of touchdowns allowed, to punts forced plus turnovers gained and several Chicago Bears’ defenses landed on the list. In their all-time list, the Bears ended up 6th, 20th, and 26th, but in the post 1978 list, Chicago’s defenses were 1st, 7th, 9th, 15th, 34th, 41st, and 49th.

Here are where those Bears’ defenses ranked.

The ‘86 defense, which still featured most of the Super Bowl cast of characters, were led by outside linebacker Wilber…