Houston Texans defense: The NFL's worst over the last 4 years You might say whoa, that's not true. And if you only rely on YPG, yes, the Texans haven't been ranked at the bottom of the league each and ever year for the last four years. Bill Barnwell of Football Outsiders was kind enough to send me a spreadsheet of their proprietary ranks of defensive efficiency. They look at each play and compare them to league averages at similar down and distances. They also factor in strength of opponent. The numbers are not pretty. Numbers don't play the game, and they are only one evaluation tool, but they basically confirm what you have seen. And these stats don't even include the close to 30+ point, 500 yard performance that the Colts had.