The contrast could not have been more stark in last year's preseason finale. One of the contenders to be the 49ers' No. 3 quarterback, Josh Johnson, threw two touchdowns and looked like a starter-caliber NFL quarterback in finishing with 125 yards through the air and another 50 on the ground, despite splitting the second-half snaps. The other quarterback, Scott Tolzien, was a couple of notches below ordinary, even against subpar competition. He underthrew receivers, had one attempt intercepted and finished with a 15.6 passer rating...
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