Former Bills OL Mitch Frerotte has died from a heart attack at the age of 43.  “He was one of those players to have on your team that was fun to have on your team,” Bills spokesman Scott Berchtold said.  “A great personality.”  Frerotte played in three Super Bowls with the Bills, Super Bowl XXV, XXVI, and XXVII.  He was mostly a special teams player, but also played on the O-line in his career.  His cousin, Gus Frerotte, is a backup QB with the Vikings.