LAKE FOREST, Ill. -- Six Chicago Bears attended organized team activities Wednesday at Halas Hall as spectators.

While it's no surprise the receiver Johnny Knox (back), linebacker Brian Urlacher (knee), offensive tackle Gabe Carimi (knee), cornerback Kelvin Hayden (toe), and long snapper Patrick Mannelly (knee) were unable to practice because of injuries dating back to last season, it's unknown why tight end Kellen Davis and Tim Jennings didn't participate.

Carimi took repetitions in a limited capacity on Tuesday, and the team held him out of Wednesday's sessions as he continues to recover from December knee surgery. Mannelly worked off to the side of the field rehabilitating with one of the team's athletic trainers.

Davis and Jennings participated in the last OTA workouts open to the media earlier in June.

The team makes players available to the media after OTA sessions, but coaches remain off limits. So there was no official word on why Davis and Jennings didn't participate. Both were starters last season.