Played baseball at Manhattan College under coach Burt Daniels. A Metropolitan All-Star shortstop, Kiefer was known for his ability with the bat and glove. Nicknamed "Red," for his red locks, George was named to the All New York College Baseball team. In a game against rival Seton Hall, George slammed two homers as part of his three hits of the day to give the Jaspers an 11-2 victory.  With offers from the Yankees, Giants and Elmira, George continued to play baseball for two seasons with the Boston Red Sox organization after graduating with honors.