They lost on the field, fought in the dugout, fell out of contention before the season’s midpoint. Then, the Chicago Cubs did something that defied their long history of failure and disappointment.Somehow, they pulled together and won the division.

Chicago’s two biggest offseason investments took them the final step toward the playoffs on Friday night. Alfonso Soriano hit another leadoff homer, Carlos Zambrano kept his cool, and the Cubs clinched the NL Central with a 6-0 victory over the Cincinnati Reds.

“Hopefully we can have a few more little parties like this,” said Lou Piniella, who enjoyed a champagne shower in his first season as the Cubs manager. “They’re fun.”

This celebration was so unexpected.