Simplify the following text for a Grade 6 native English-speaking person.
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 ) .