In his first career game, he recorded his first career interception against Tom Brady. The ruling on the field was a touchdown, but was later overruled when replay showed that Whitner had stepped out of bounds. He finished 2006 with 104 total tackles and one interception for 10 yards. In 2009, Whitner recorded his first career touchdown on a 76-yard interception return from Tampa Bay Buccaneers quarterback Byron Leftwich in Week 2. His most productive game to date was in Week 12 of the 2010 season, where he recorded 18 total tackles against the Pittsburgh Steelers.