Welker and Frerotte played well. Frerottte showed poise in the pocket and he was willing to side step defensive lineman to make some throws.
I think Feeley's pocket presence was bad. He was almost nimble, any sort of pressure threw off his composure. That might be expected when it's the preseason and the first string Bears defense is blitzing like crazy. The o-line did well for the first few drives, after that one of the tailbacks missed picking up a couple of blitzes. Feeley ended up paying the price.
If you ask me, you want a quarterback whose going to stand in the pocket until the last second. You want someone whose tough. Feeley didn't help himself today by limping to the sidelines after losing composure on every blitz.