There are triples like the thoroughbred racing Triple Crown, which require victories in each of the three top races for three-year-olds; triples like the baseball Triple Crown, which require statistical dominance in three categories; and triples like the cycling Grand Tour, which requires titles in the three biggest races over a career. Ranked by difficulty based (mostly) on frequency of occurrence, here are the Top 10 Hardest Triples in Sports.
http://www.realclearsports.com/lists/top_10_hardest_triples_in_sports/intro.html
