so what are the biggest single events in sports over the past 25 years? These are in no particular order

Red sox win the world series
Mets come back to beat Red Sox in 86 series
McGwire (and Sosa for that matter) break Maris' record
Miracle on Ice
US gets ass kicked in Olympic basketball

When you start intertwining sports with world events and "stories" it gets more interesting

Dale Earnhardt's death
Lance Armstrong

What else guys???