Big Brown did not win because he was not the first horse to cross the finish line.I think it was the creaked heal just patched a couple of days before race.When asked to run to catch leaders the pain in his foot was too much and he just could not perform as he has in all his other races.I f it was not such an important race Big Brown would not have raced.There was not enough time for his heal to mend and when he pulled up you could see he was not putting his weigh on that foot as much.