I've heard so many different things with Manning, I don't know what to think. The last purported insider report I heard was "Don't count him out just yet, he could still see some action before the season is done." Official word from Frost is that there's some sort of nagging injury, but he might just be covering for Manning. I tend to believe that it may have been a combination of injury and personal issues that led to him falling behind, and he's slowly been trying to catch up on learning the offense & playbook.