This is the third part of an eight-part series in which Football Outsiders looks at the biggest holes remaining on each team going into the offseason. Remember, some of these holes may not actually be holes if teams re-sign their own players, and other holes will be filled during free agency and the draft.
Today, Outsiders looks at the AFC South.
Houston Texans: Wide receiver
The Texans enter free agency as a team with a promising amount of depth at many key areas, but Andre Johnson's injury last season exposed the fact that Houston's wide receivers simply aren't up to snuff without him. Nominal No. 2 receiver Kevin Walter saw his DVOA drop under 10 percent for the first time since 2007, and before you go thinking that was caused by an increased role, he actually had 21 fewer targets than he did in 2010. (DVOA is Football Outsiders' defense-adjusted value over average metric, explained here.)