Have you looked at some the rushing totals from running backs in the first half?
If you started these guys, you might want to look away (or pray for improvement in the second half).
Ronnie Brown at Texans: 5-27-0
Matt Forte at Falcons: 6-10-0
Earnest Graham vs. Panthers: 4-10-0
Steven Jackson at Redskins: 11-28-0
Darren McFadden at Saints: 3-10-0
Willis McGahee at Colts: 7-14-0
Adrian Peterson vs. Lions: 12-47-0
Steve Slaton vs. Dolphins: 8-33-0
Michael Turner vs. Bears: 13-39-0
Oh and Patrick Cobbs has more fantasy points than all of these backs combined.