Lewis said after Sunday's game against the 49ers that he will have an MRI on Monday to determine the extent of his left knee/quad injury, the New Orleans' Times-Picayune's Jeff Duncan reports. The injury that forced him out of Sunday's game temporarily was originally called a quad injury, but Duncan's report indicates that Lewis will have an MRI on his knee. We should know more after the exam, including whether he might be able to play next Sunday against the Bengals.