Seahawks' linebacker Lofa Tatupu has pleaded guilty to a charge of driving under the influence, according to The Associated Press. After his plea on Monday, Tatupu was sentenced by a Kirkland Municipal Court Judge to serve one day in jail and pay fines totaling $1,255. In late March, the Seahawks signed the third-year, 25-year-old Tatupu to a $42 million, six-year contract extension.