Penn State defensive coordinator Ted Roof has resigned after one season to take the same job at Georgia Tech. Coach Bill O'Brien announced Wednesday that secondary coach John Butler will replace Roof.
Butler, a graduate of La Salle High, also worked with the Nittany Lions' special teams and was instrumental in sophomore kicker Sam Ficken's overcoming a horrendous start to make his last 10 field-goal attempts.
Roof played linebacker for Georgia Tech from 1982 through 1985, earning all-ACC honors as a senior. He returned to his alma mater in 1998 and served as defensive coordinator from then through 2001 while coaching on the same staff as O'Brien.