Complex sentence: The Cubbies traded him to the Brooklyn Dodgers for Toby Atwell in December, who sent the 25-year-old Mauro to the International League for his career year, hitting.327 with eleven homers in 140 games for the Montreal Royals in 1952.
Split into simpler sentences: The Cubbies traded him to the Brooklyn Dodgers for Toby Atwell in December. They would send the 25-year-old Mauro to the International League where he had his career year, hitting.327 with eleven homers in 140 games for the Montreal Royals in 1952.