Richard Seymour insists he’s not dirty, but got fined for hit on Cassel

Raiders defensive tackle Richard Seymour took exception to it when Chiefs defensive end Tamba Hali called his team dirty. But the league office said one of Seymour’s hits against the Chiefs was a cheap shot. The NFL has confirmed that Seymour was fined $15,750 for roughing the passer because he unnecessarily threw Chiefs quarterback Matt…