The World Series has been the annual championship series of the highest level of professional Baseball in the United States of America and Canada.
Brigadier General Jack O'Neill wanted to use the Time Jumper to travel to 1908 to watch the Cubs win the World Series. (SG1: "Moebius, Part 1")
When transported 48,000 years into the future, Lt. Colonel John Sheppard asked if Dr. Rodney McKay had noticed who had won the World Series. (ATL: "The Last Man")