Frazier: "Sometimes, it is as simple as a mindset and an attitude change."   The Buffalo Bills have a top-five defense, but there were times on Sunday against the Jaguars when it looked mediocre, primarily defending the run. Buffalo surrendered 173 rushing yards out of 203 total yards to the visiting team, including 13 carries for 83 yards for their star running back, Leonard Fournette. The 8.2 yards per carry versus defensive coordinator Leslie Frazier’s gameplan was a surprise. “How