Original: 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).
Simplified: 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).