Colts quarterback Peyton Manning has conceded that the neck surgery he had May 23 to correct a bulging disk and the lockout have put him in a "cautious" mode on being physically active. "The lockout didn't allow me to work my (Colts) therapist, Erin Barill, and I'm just not comfortable taking any chances with this thing," Manning said. "Erin knows me. He's rehabbed me through two other surgeries (neck and knee) and I think most people understand that once you build up a trust with your therapist, that's the guy you want and need to work with." He said he had "no idea" when he will be able to participate in training camp until he gets an assessment from Barill. He has been rehabbing with other therapists. Manning, 35, is rehabbing from his second neck-related surgery in 15 months.