WR? Who should ride the pine?

Which receiver should i sit? T.J. Houshmandzadeh @ San Fran, Andre Johnson vs Den, Brandon Marshall @ Hou, or Larry Fitzgerald @ N.O. Palmer has played like crap the past couple of weeks, Johnson has Rosenfels and goes against Bailey, Marshall fell on his shoulder @ the end of his game last week and Fitzgerald has a groin problem. Any thoughts would be helpful!!!