The so-called "City Series" is losing a chunk of games as the MLB schedule realigns in 2013. According to the Chicago Tribune, the regional rivalry games -- such as the New York Mets versus the New York Yankees -- will be reduced in deference to greater in-division balance:
"The fairness issue was the reason to move away from playing six games against certain opponents every year," [union leader Michael Weiner] said. "The Mets, for instance, have had six games against the Yankees every season while other teams in their division might play teams that aren’t as strong. We are moving off that."
The Chicago White Sox won the 2012 edition of the City Series, beating the Chicago Cubs two games to four. The average attendance for the six games -- three in Wrigley Field, three at US Cellular Field -- was well above 30,000.