Complex sentence: William Henry Walker (October 7,1903-June 14,1966) was a professional baseball left-handed pitcher over parts of ten seasons (1927-1936) with the New York Giants and St. Louis Cardinals.
Split into simpler sentences: William henry Walker (October 7,1903-June 14,1966) was a professional baseball player. He was a pitcher over parts of ten seasons (1927-1936) with the New York Giants and St. Louis Cardinals.