NFL's biggest disappointments

3:39 | NFL
NFL's biggest disappointments's Andrew Perloff names a few players who have not been playing up to expectations during the first half of the 2012-13 NFL season.
SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.