Patriots wide receiver Wes Welker has participated in individual drills lately, but Mike Reiss of ESPNBoston.com writes that it's still optimistic to think he'll be ready for Week 1 of the regular season. "If I had to make an educated guess, Welker will open training camp on the physically unable to perform list, and will remain there through at least the first six weeks of the regular season," Reiss writes. Welker is recovering from a major knee injury.