Greenberg: Bears' Big 3 proving ground

LAKE FOREST, Ill. -- Roy Williams is new here, but he's a quick learner.

The veteran wide receiver is the defacto No. 1 receiver for the franchise where "receivers go to die," and he's a fading star to boot.

The questions bombard him daily. Will he bounce back from a disastrous Cowboys stint? Is he living off his name? And why don't people get his sense of humor?

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