We handle sports photography for large events using some 17 4gig cards of our own, plus cards brought by additional photographers hired when needed.
For a big event, most games are known, scheduled.
So these get organized in a list in Excel with columns for: Game ID #, Game Time, Field/Location, Photographer, Team1, Team2
The Excel file is then read into Word as a mailing label merge data set and printed to business card stock (Avery #5371). The resulting cards are stacked and rubber banded together before the event.
At the event, each shooter gets their stack of cards and goes off to shoot ... taking a picture of the card before each game ... like a movie "slate" at the beginning of each take. These show up clearly in any photo browser, and not only mark the start of a new game, but lists all the details for each game covered.