31. Houston Texans Abandon all hope, ye who enter here ... especially if thou art a quarterback. Especially if thou art David Carr, a young man who could teach a certain Mr. Manning a thing or three about not throwing his linemen under a bus. Football Outsiders, as part of our game-charting project, tracks blown blocks that lead directly to sacks. Houston far exceeded any other team, racking up 40 blown blocks ("whiffs", you might call them St. Louis was second with 29). The truly frightening number: 8.1 percent of Houston's pass plays resulted in a blown block sack. New head coach Gary Kubiak will bring his knowledge of Denver's zone blocking system to Houston, but who are the guys who are supposed to implement it? Right tackle Zach Weigert, left tackle Seth Wand, guards Chester Pitts and Steve McKinney, and center Mike Flanagan will be directed to drop weight and get quicker in the new schemes that require them to get out of the blocks quickly and get to the second level. Overseeing this progression will be former Green Bay head coach Mike Sherman, Kubiak's right-hand man on the offensive side. One bit of encouraging news is that Houston improved to eighth in Adjusted Line Yards in 2005, but that won't make up for another season of historically woeful pass-blocking.