Big games for the Yanks or Sox, perhaps

• Oct. contest whose winner goes to the World Series
• Oct. baseball semifinal
• World Series precursor, for short
• World Series lead-in: Abbr
• Part of the MLB postseason
• Oct. pennant race
• L.A. lost it to Chi. in 2005

Wikipedia Word definitions in Wikipedia
ACLS commonly refers to the American League Championship Series in American baseball ALCS may also refer to: Abundant Life Christian School , a K4-12 school in Madison, Wisconsin ALCS transaction monitor , an IBM mainframe transaction processing monitor ...

Wiktionary Word definitions in Wiktionary
n. 1 (context baseball English) The http://en.wikipedia.org/wiki/American%20League%20Championship%20Series, a best of seven game series played to determine the champion of the American League. 2 Altria Corporate Services, Inc., a wholly owned subsidiary ...