Complex sentence: The Atlanta Braves won their 10th straight division title, despite having the worst record (88-74) among playoff teams, and was also the Braves' worst season since 1990, when they had the worst record in baseball.
Split into simpler sentences: The Atlanta Braves won their 10th straight division title, despite having the worst record (88-74) among playoff teams. With that record, 2001 was also the Braves' worst season since 1990, when they had the worst record in baseball.