I’ve never actually been to Wrigley Field before, so had to look up both of these signs. Luckily, my iPhone got reception, and was able to find the Wikipedia entry:
en.wikipedia.org/wiki/Wrigley_Field
The Lakeview Baseball Club, which sits across Sheffield Avenue (right-field) from the stadium displays a sign that reads, “Eamus Catuli!” (roughly Latin for “Let’s Go Cubs!”—catuli translating to “whelps”, the nearest Latin equivalent), flanked by a counter indicating the Cubs’ long legacy of futility. The counter is labeled “AC,” for “Anno Catuli,” or “In the Year of the Cubs.” The first two digits indicate the number of years since the Cubs’ last division championship as of the end of the previous season (2008), the next two digits indicate the number of years since the Cubs’ last trip to the World Series (1945), and the last three digits indicate the number of years since their last World Series win (1908).