Hall of Fame center and former NFL head coach Jim Ringo has died.  The Pro Football Hall of Fame’s official website said Ringo passed away early Monday morning after battling a short illness.  Ringo spent 15 seasons in the NFL.  He played for the Green Bay Packers from 1953-1963, and the Philadelphia Eagles from 1964-67.  Ringo was voted to 10 Pro Bowls, and was selected as a member of the NFL’s All-Decade Team of the 1960s.  He also appeared in a then-record 182 straight games from 1954 to 1967.  In 1976 and 1977, Ringo was the head coach of the Buffalo Bills.  He guided the team to a 3-and-20 record during his two-year tenure.  Ringo was inducted into the Hall as a player in 1981.  Ringo’s death comes two days shy of his 76th birthday.