Campbell was 10-of-20 for 170 yards with an interception in the first half. Boller was 7-of-9 for 55 yards in the second half for the 2-0 Raiders.
Michael Bennett ran for 64 yards on 15 carries as Oakland came back from a 14-13 halftime deficit.
Jay Cutler hit 7-of-15 passes for 99 yards and a score for the 0-2 Bears.
Matt Forte rushed for 109 yards, including an 89-yard touchdown run in the first quarter.
Chicago linebacker Brian Urlacher left in the first quarter and missed the rest of the game with a left calf injury of unknown severity.