After Stanky was traded to the Boston Braves in March 1948 , Robinson took over second base . There he had a .980 fielding percentage for year ( second in the National League at the position behind Stanky ) . Following Stanky 's trade to the Boston Braves in March 1948 , Robinson took over second base , where he logged a .980 fielding percentage that year ( second in the National League at the position , fractionally behind Stanky ) .