Suh says he’s not a dirty player

After Lions defensive tackle Ndamukong Suh roughed up Bengals quarterback Andy Dalton in the preseason opener, I asked whether Suh is a dirty player. Unsurprisingly, Suh says he’s not. “There’s always a fine line between dirtiness and aggressiveness,” Suh said. “I know to this point, in my own heart, I haven’t crossed that line by…