Complex sentence: He spent two seasons in Chicago, before closing out his career in the American League with the Red Sox and Orioles, and playing one final season in 1963 with the Yomiuri Giants in Japan.
Split into simpler sentences: He spent two seasons in Chicago before closing out his major league career in the American League with the Red Sox and Orioles. He played one final season in 1963 with the Yomiuri Giants in Japan.