Not since Affirmed won the Triple Crown in 1978 has a horse managed to win all three of the sport’s premier racing events. And it won't happen today, either. I'll Have Another, a horse that already had notched victories in the Kentucky Derby and the Preakness, was scratched from the race card yesterday, out of concern for an apparent injury to his left front leg. So you may see a good race today -- but you won't see significant track history being made.