cinman@bayareanewsgroup.com SANTA CLARA – Here is how the 49ers (4-2) graded in their 30-22 win Sunday over the visiting Arizona Cardinals (3-3): Pass offense: It's become embarrassing how much the 49ers rely on Vernon Davis (180 yards, two-touchdowns) and Anquan Boldin (three catches, 28 yards). But at least Davis embarrassed the Cardinals defense, with Colin [...]