Yesterday, I looked at the best defenses in football history in terms of (estimated) points allowed on an (estimated) per drive basis. Today, the reverse: the worst defenses in history, at least, without adjusting for era, in terms of points allowed per drive.

The 1981 Colts take the top spot, and that’s not going to be a surprise to any fan of NFL history. Those Colts teams were terrible, particularly on defense. In ’81, Baltimore beat New England 29-28 in week 1, beat New England 23-21 in the last game of the season, and lost every game in between. In ’82, Baltimore finished 0-8-1. In fact, beginning in December 1980, over the team’s next 31 games, the Colts went 3-1 against the Patriots and 0-26-1 against the rest of the NFL! And beginning in ’81, the Colts went 24 straight games without being favored.

The ’81 Colts finished last in just about every defensive category, including points, yards, turnovers, first downs, passing touchdowns, rushing touchdowns, and net yards per attempt. Baltimore’s defense ranked in the bottom three in both rushing yards and passing yards, too. Baltimore allowed 533 points, which remains the most in a single season in NFL history, undisturbed by the modern era.

Here’s how to read the table below, which shows the 200 worst defenses by this metric. In 1981, Baltimore faced 177 estimated drives (measuring drives by the end of drives) or 180 estimated drives (measuring drives by the start of drives). The Colts allowed 529 estimated points, which means the defense allowed 2.96 points per estimated drive, the most of any team since 1950.

• Number 2 on the list? The awful 1966 Giants, whose defense was so bad the team responded by trading two first round picks and two second round picks for Fran Tarkenton. New York famously allowed 72 points in a game in Washington that season, which I imagine did not help out their numbers here. Washington scored ten touchdowns that day, although only seven came on offense!

• The 2008 0-16 Lions take the third spot on this list. No surprise there. The 2011 Bucs — coached by Raheem Morris and notable for being terrible at not quitting in the middle of a football season — have the fourth spot. Tampa Bay started the season 4-2, but lost their last 10 games, allowing 349 points over that period, an even worse rate than the ’81 Colts over a full season.

• Jay Cutler has two teams crack the top ten of this list! The 2008 Broncos and the 2014 Bears, two of the more disappointing teams in their respective franchises recent history. The Broncos were 8-5 and held a 3-game lead in the AFC West, but wound up missing the playoffs after allowing 52 points to the Chargers in the final game of the season. The 2014 Bears? Over the three-week period from week 8 to week 10 of the 2014 season, no team allowed more points than Chicago (104). That’s pretty impressive, given that the Bears had a week 9 bye.

Leave your thoughts in the comments!