Bell ran for touchdowns of 1 and 3 yards. New Orleans (10-0) also scored on a 38-yard field goal by John Carney, which broke a 7-7 tie in the second quarter.
Tampa Bay Rookie Josh Freeman completed 17-of-33 passes for 126 yards, including an 18-yard scoring toss to Michael Clayton, but was intercepted three times.
The Buccaneers (1-9) had just 219 yards total offense.
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