(San Francisco, CA)  --  The San Francisco 49ers say former Oregon Duck and 49ers standout center Fred Quillan has died at age 60.  The NFL team's website says Quillan died Monday.  He played on two Super Bowl championship squads as a member of the 49ers from 1978 to 1987.  Quillan was a Portland native who graduated from Central Catholic High School, and played for the Ducks from 1975 to 1977.