ATLANTA — Georgia Tech fired defensive coordinator Al Groh on Monday, hoping a change will save what has been a hugely disappointing season. Coach Paul Johnson announced the move two days after the Yellow Jackets (2-4, 1-3 Atlantic Coast Conference) lost 47-31 to No. 16 Clemson, their third straight defeat — all of them while surrendering more than 40 points, the first time that's happened in school history.